A lot of sexual references.
Sexual objects appear every now and then (dildos, sexual statue of a man with large penis, etc).
A man's (clearly fake) penis is shown wrapped around his leg.
A man and woman have clothed sex until they orgasm in front of another man who never happens to look at them; the next day semen-like fluid is shown on the back of her pants.
An elderly woman's head is shown in front of a man, and it is implied that she's giving him a blowjob, but nothing is seen.