Jokes aside I do prefer that idea that an adult man isekai'd would be all like "these are children". Too often we get the MC de-aged and suddenly young girls are on the table again as if your preferences from your previous life didn't actually matter. Its weird.
I'mma be real, in my youth and my current old age I didn't/don't often look at a woman and ask to myself "Hmm, how fertile is she?" Especially as such traits that exhibit fertility are often that secondary sexual traits that become more pronounced after childbirth such as bust and hip size.
His beloved women get bad end so his trauma has made him call a poor teenager a lolicon for liking women his age how sad ;-; thank god he can swim in an ocean of his beloved mamas in this life