And it teaches that he can't be held responsible for his actions because some girl in middle school rejected him, so now he's afraid of commitment. The women in this film aren't even treated as people, but rather as playthings for the protagonist. It teaches horrible pickup tricks that you should belittle and play mind-tricks on women and they'll come crawling to you. It's full of stereotypes, portraying women as hysterical, ditzy, and objectifying them at every turn.
If you're watching this with kids, it's extremely inappropriate, and not just because of the constant talk about sex, but rather because it sends extremely harmful messages to boys and girls alike. I don't know in what world this movie passed off as a rom-com, there is nothing romantic or comedic about this film.