At the very end of the movie, a man and a woman enter into an hotel room, to have sex. The woman disrobes completely and we see her fully nude for about two seconds.
A middle aged couple invite a young man to have sex with them. They tell him to sit on the bed next to them and the woman says that giving and receiving pleasure are the same thing, at which point the man runs away. This scene is has no nudity and is played for comedic effect but can be uncomfortable for viewers.