Damn, by reading manga, I can learn so much from the Japanese culture.
Like, even adults always act like 1820's virgins. If a man seesa beautiful woman's cleavage, he'll pop a boner and start having a nosebleed. Holding hands is worst than having sex.
Even married people, with kids, still blush when their significant other calls them by their given name. There's a ton of beautiful, sexy, intelligent and successful women, well in their 30's, but still virgins with absolutely no experience with the opposite sex.
Also, friendship between sexes is not even considered a possible thing. The guy always desires and lusts for the girl, and the girl always falls in love with the guy.
And finally, even in coed schools, boys and girls never ever talk to each other, except on valentine's day or to make a confession.