Teenager Otis's mother is a professional sexologist and is ready to give advice on any question about intimacy. However, he is struggling with it. He doesn't know how to masturbate, his genitals hardly respond to touch, and he's already sixteen. It turns out that sexual problems are not only his, but half of the school's. It's time to apply his mother's knowledge, and Otis becomes a local sexologist. And why not, it's not a bad business.