In what has got to be the most strange censorship I've ever seen, the people who made this digitally removed the guy's genitals whenever they might show. They didn't put a black bar over them or strategically hide them, they actually removed them. So there's just an empty space there - and it looks _really_ strange. They also made sure you don't see much of the woman's genitalia or backside, either. So basically this consists of the couple demonstrating various positions without actually showing anything except them sliding around each other. It's not erotic, it's not instructional, it's just dumb.
On the plus side, the woman is attractive, but you're left wishing you could see all of her.