guy from work obsessed with Nina Hartley

coworker has pictures of nina hartley all over his house. He has a gigantic picture of her butt with her cheeks spread in his garage.

I saw all of this at a recent party that he threw with men and women. This is one of those guys that can get away with anything with anyone. A lot of the women were laughing covering their mouths and laughing at his Decor.however I can tell that a lot of people didn't like it. I didn't really care for it myself but it was because it was in mixed company. this guy is good looking and can get any woman he wants. He's also a good athlete and successful in business (my company bought an integrated his company )however, after seeing what he had all over his house is kind of lost respect for him to feel like he must be insane. Any thoughts?