Boku no Kokoro no Yabai Yatsu - Ch. 173 - I Was Tempted

[shinshom]

Omg Norio is being horny agaaaain :x....

 

[Sky_Ravager]

ARE THEY GOING TO DO IT????????

thanks for the chapter

 

[the_legendary_klobb]

Omg Norio is being horny agaaaain :x....

Curious, when is Norio-sensei NOT horny? Was there ever a time like that?

 

[micz7ryu]

…

 

[RooktheRH]

Last page be like
Anna: don't think so young man. You gonna write this and then not fuck me? Go to your room, RIGHT. NOW.
Kyo: I FUCKING HATE IT HERE stomps away

 

[MangaRockRefugee]

Manga readers when they see the chance for two middle schoolers to have sex together

I mean, we're reading this series, living vicariously through these characters, just to sleep and dream of exact same thing happening to us.
Can you really blame us for hoping for segggs?

 

[TheMather1]

This is Japan, no LATAM.

You never know. Japan has some strict guidelines, but they are ultimately just guidelines.
They're even stricter about underage drinking than they are about sex, but the single best-selling LN of all times has 15-year-olds deliberately get shitfaced on multiple occasions to cope with stress, and it's treated as harmless gags.

 

[Demonaire]

You never know. Japan has some strict guidelines, but they are ultimately just guidelines.
They're even stricter about underage drinking than they are about sex, but the single best-selling LN of all times has 15-year-olds deliberately get shitfaced on multiple occasions to cope with stress, and it's treated as harmless gags.

Japan has a teen pregnancy rate 10 times lower than the LATAM country with the lowest rate. That's why those kind of situations, if ill-managed, can lead to controversies, like in Kaguya-sama.

 

[Aoi_Mizuha]

HOLY SHIT, MOEKO IS RIGHT, THEY'RE ACTUALLY DOING IT

 

[Erricane]

Oh yea. Kyou is the definitely the bottom in this relationship of this keeps up. XD

But knowing Anna she wants him to be the top.

 

[nekotousan]

punching my wall rn

 

[Haydrion101]

S... Sexo?
I know Yamada wants it.

 

[wallsg]

Not sure how I feel about this, they're both 14 after all. Young age, especially in Japan, to lose your v-card.

Even younger than most of us here think, as it seems.

Here's what ChatGPT had to say...

"What is the normal age for first intercourse in Japan"

Spoiler: Answer

In Japan, the average age for first sexual intercourse tends to be around 19 to 20 years old, based on national surveys and academic studies.

Key Points:​

• A survey by the Japanese Association for Sex Educationfound the average age of first intercourse to be:
  • Men: ~19.4 years old
  • Women: ~18.9 years old
• This age has remained relatively stable over the past couple of decades.
• Sexual activity among teenagers is less common in Japan compared to some Western countries. Cultural norms, emphasis on education, and societal pressure often delay sexual debut.

If you're interested in more specific breakdowns (e.g., by region, gender, or over time), I can help find those too.

"Which prefect had the lowest age"

Spoiler: Answer

According to the 2013 Sagami Original Condom survey, which gathered self-reported data on the average age of first sexual intercourse across Japan's 47 prefectures, the prefecture with the lowest average age was:

🏆 Okinawa Prefecture​

• Average age of first sexual intercourse: 19.6 years
• This was the earliest among all prefectures in the survey.

Other relatively low-ranking prefectures (earlier age) included:

• Aomori: ~19.7 years
• Fukuoka: ~19.8 years
• Osaka: ~19.8 years

---

Prefectures with the latest (oldest) average:​

• Ibaraki Prefecture had the highest average age, around 21.1 years

---

Important Notes:​

• This data is from 2013 and may not reflect current trends.
• The survey relied on self-reported answers, which may have some bias or inaccuracies.
• No government-backed prefecture-level data on this topic exists publicly—Sagami's data remains the most specific source.

Let me know if you'd like a full ranked list of all 47 prefectures from that survey.

"at what age have 10% of girls had first intercourse in Japan"

Spoiler: Answer

ChatGPT could not give exact data but had this to say:

✅ Summary:

• Median age of first intercourse for women in Japan is approximately 19–20 years.
• No official public data specifies the 10th percentile age.
• If you need an approximate range, I'd estimate around 16–17 years, though no official figure supports that.

---

"First intercourse age in USA"

Spoiler: Answer

In the United States, the average age of first sexual intercourse is approximately:

🇺🇸 Average Age in the U.S.​

• Men: ~17.0 years old
• Women: ~17.3 years old
  (Sources: CDC – National Survey of Family Growth, 2015–2019)

---

💡 Key Insights:​

• Roughly 55–60% of teens have had sex by age 18, according to CDC data.
• Most Americans have their first sexual experience during high school or shortly after.
• The age has remained relatively stable since the 1990s, with slight regional and demographic variations.

---

🧠 Contextual Comparison:​

Country	Avg Age at First Intercourse
USA	~17 years
Japan	~19–20 years
France	~17.2 years
UK	~16–17 years
Germany	~17 years

So, compared to Japan, Americans generally begin sexual activity 2–3 years earlier.


Would you like data broken down by gender, ethnicity, or U.S. state?

 

[HenkumaEnthusiast]

SEGGS
we hope but it'll probably only be implied.

 

[UdenEmpati]

Even younger than most of us here think, as it seems.

Here's what ChatGPT had to say...

"What is the normal age for first intercourse in Japan"

Spoiler: Answer

In Japan, the average age for first sexual intercourse tends to be around 19 to 20 years old, based on national surveys and academic studies.

Key Points:​

• A survey by the Japanese Association for Sex Educationfound the average age of first intercourse to be:
  • Men: ~19.4 years old
  • Women: ~18.9 years old
• This age has remained relatively stable over the past couple of decades.
• Sexual activity among teenagers is less common in Japan compared to some Western countries. Cultural norms, emphasis on education, and societal pressure often delay sexual debut.

If you're interested in more specific breakdowns (e.g., by region, gender, or over time), I can help find those too.

"Which prefect had the lowest age"

Spoiler: Answer

According to the 2013 Sagami Original Condom survey, which gathered self-reported data on the average age of first sexual intercourse across Japan's 47 prefectures, the prefecture with the lowest average age was:

🏆 Okinawa Prefecture​

• Average age of first sexual intercourse: 19.6 years
• This was the earliest among all prefectures in the survey.

Other relatively low-ranking prefectures (earlier age) included:

• Aomori: ~19.7 years
• Fukuoka: ~19.8 years
• Osaka: ~19.8 years

---

Prefectures with the latest (oldest) average:​

• Ibaraki Prefecture had the highest average age, around 21.1 years

---

Important Notes:​

• This data is from 2013 and may not reflect current trends.
• The survey relied on self-reported answers, which may have some bias or inaccuracies.
• No government-backed prefecture-level data on this topic exists publicly—Sagami's data remains the most specific source.

Let me know if you'd like a full ranked list of all 47 prefectures from that survey.

"at what age have 10% of girls had first intercourse in Japan"

Spoiler: Answer

ChatGPT could not give exact data but had this to say:

✅ Summary:

• Median age of first intercourse for women in Japan is approximately 19–20 years.
• No official public data specifies the 10th percentile age.
• If you need an approximate range, I'd estimate around 16–17 years, though no official figure supports that.

---

"First intercourse age in USA"

Spoiler: Answer

In the United States, the average age of first sexual intercourse is approximately:

🇺🇸 Average Age in the U.S.​

• Men: ~17.0 years old
• Women: ~17.3 years old
  (Sources: CDC – National Survey of Family Growth, 2015–2019)

---

💡 Key Insights:​

• Roughly 55–60% of teens have had sex by age 18, according to CDC data.
• Most Americans have their first sexual experience during high school or shortly after.
• The age has remained relatively stable since the 1990s, with slight regional and demographic variations.

---

🧠 Contextual Comparison:​

Country	Avg Age at First Intercourse
USA	~17 years
Japan	~19–20 years
France	~17.2 years
UK	~16–17 years
Germany	~17 years

So, compared to Japan, Americans generally begin sexual activity 2–3 years earlier.


Would you like data broken down by gender, ethnicity, or U.S. state?

You gonna maybe back that up with some verified source statistics that don't come from a data-soup machine?

 

[wallsg]

You gonna maybe back that up with some verified source statistics that don't come from a data-soup machine?

I'm not going to defend ChatGPT, but as minimal effort here's what it lists for citations (all of these hand copied as I don't immediately see a way to export them):

"What is the normal age for first intercourse in Japan"

Spoiler: citations

Japan’s sex habits laid bare – Condom maker reveals results of national survey

Trends in heterosexual inexperience among young adults in Japan: analysis of national surveys, 1987–2015

Aging of Japan

Average Age to Lose Virginity by Country 2025

(This one is Reddit so probably junk)
Study: Average Age to Lose Virginity by Country 2024. Does this match your experience?

ZIPDO EDUCATION REPORT 2025
Virginity Age Statistics

Intimate Japan: Ethnographies of Closeness and Conflict

Awareness Survey of 18-Year-Olds – Sexual Activity

Virgin territory: study shows sexual inexperience rising in Japan

First national estimates of virginity rates in Japan
One in ten adults in their 30s remains a virgin, heterosexual inexperience increasing

https://www.sexquest.com/ccies-kinsey/jp.php.html

Condom maker reveals results of national survey on sex

Effects of the Family Formation Norms on Demographic Behaviors'
-Case of Okinawa in Japan-

Gender Differences in the Timing of First Intercourse: Data from 14 Countries

"Which prefect had the lowest age"

2013 Sagami Original Condom survey (notes no government data and self-reported answers)


"at what age have 10% of girls had first intercourse in Japan"

Spoiler: Full ChatGPT reply

I wasn’t able to locate precise statistics from reliable sources (e.g., Japan’s National Fertility Survey) indicating the age by which 10% of girls in Japan have had their first sexual intercourse (i.e., the 10th percentile of sexual debut).


Here’s what is known:

• The 16th Japanese National Fertility Survey (conducted June 2021, results released February 2024) provides data on median and average ages of first heterosexual intercourse, but does not include percentile breakdowns by exact age such as 10th percentile ipss.go.jp EurekAlert!.
• National-level studies show that among adults aged 30–34, around 11.9% of women in 2015 reported no heterosexual intercourse experience, implying roughly 88% had sexual activity by that age—but this still doesn’t specify exactly at what younger age 10% had begun EurekAlert!.
• International reports (e.g. “virginity maps”) sometimes estimate Japan's median sexual debut as around 19.4 years Reddit, but these aggregate across genders and lack detailed percentile breakdowns.

Since detailed percentile data (like the age when 10% of women have had intercourse) isn't publicly released, a precise figure isn't available. It is quite likely, based on cultural norms and the observed median age (~19–20), that 10% of Japanese girls might have experienced intercourse in their mid‑ to late teens, perhaps around 16–17 years, but that is speculative.

---

✅ Summary:

• Median age of first intercourse for women in Japan is approximately 19–20 years.
• No official public data specifies the 10th percentile age.
• If you need an approximate range, I'd estimate around 16–17 years, though no official figure supports that.

"First intercourse age in USA"

(Sources: CDC – National Survey of Family Growth, 2015–2019)

 

[UdenEmpati]

I'm not going to defend ChatGPT, but as minimal effort here's what it lists for citations (all of these hand copied as I don't immediately see a way to export them):

Japan’s sex habits laid bare – Condom maker reveals results of national survey

Trends in heterosexual inexperience among young adults in Japan: analysis of national surveys, 1987–2015

Aging of Japan

Average Age to Lose Virginity by Country 2025

(This one is Reddit so probably junk)
Study: Average Age to Lose Virginity by Country 2024. Does this match your experience?

ZIPDO EDUCATION REPORT 2025
Virginity Age Statistics

Intimate Japan: Ethnographies of Closeness and Conflict

Awareness Survey of 18-Year-Olds – Sexual Activity

Virgin territory: study shows sexual inexperience rising in Japan

First national estimates of virginity rates in Japan
One in ten adults in their 30s remains a virgin, heterosexual inexperience increasing

https://www.sexquest.com/ccies-kinsey/jp.php.html

Condom maker reveals results of national survey on sex

Effects of the Family Formation Norms on Demographic Behaviors'
-Case of Okinawa in Japan-

Gender Differences in the Timing of First Intercourse: Data from 14 Countries

you followed up and delivered. I respect that, cheers.

 

[wallsg]

You gonna maybe back that up with some verified source statistics that don't come from a data-soup machine?

I updated my answer with more data after accidently posting it incomplete.