There is a lot of sexual dialogue and humor throughout the series, and multiple sex toys are seen in the house, though they are censored.
Derek is homosexual, and there are a lot of jokes targeted towards his sexuality.
There is a brief scene where Erin tries to watch TV, but it has nothing but porn on it. The porn is censored, but can still be made out a little bit.
Alex pulls one of her breasts out of her shirt, but it is censored and brief.
Tara grinds on Jay briefly.
Frank pulls down his pants briefly, but it is censored.
During a photoshoot, Frank is forced to wear a gimp outfit.
Despite the title, there is very little sex in the series. Frank has sex twice in the series, though both times we don't see much. After the second time, he is seen naked, holding a pillow over his crotch.
There is some scattered heavy kissing in the series, including one kiss between two men.