A woman dances and straddles a man. They make out, there is a lot of moaning. The man removes the woman's dress and she is in a bra and underwear. They writhe up against each other and moan heavily. He kisses her all over her body but then he stops because he is uncomfortable.
There a scene where a man and woman have "phone sex". Both of them are heard moaning and climaxing, but the man is implied to be masturbating.
There is lots of sexual dialogue.
Theodore looks at a drawing of a man having sex with a woman's armpit.
In one of several sexual dialouges in the movie, a woman bizzarly demands that the man "strangle me with a dead cat" while they imitate a sexual encounter over online chat.
A nude, pregnant woman is shown during a fantasy sequence. Complete frontal nudity of the woman provides insight into the protagonist's interest in alternatives to standard human interactions. The scene is about 10 seconds.
A scene where a man looks at a couple of pics of a pregnant woman. She is implied to be nude, but we only see her bare back.