Twice in the movie, Goat Man (David Duchovny) is shown naked from behind.
In another scene, one of Bennet's (Justin Kirks) testicles slips out from his bathing suit, this happens twice. The first time, he is talking with Goat Man (David Duchovny). The second time he is with two females.
In another scene we see a man performing fellatio for another man, but it is very tame, nothing explicit is shown.
Late in the movie the main character, who is a minor, goes into a club where there are women stripping, the strippers are mostly in the background of the scene and he is shortly asked to leave.
There are a few scattered references to sexual acts and sex organs, but mostly as euphemisms.
The mother has a boyfriend who wears such a skimpy bathing suit, at least twice one of his testicles is partially shown.