Sex scene at the start of the film, couple are seen thrusting while having sex in bed. No nudity. Lasts about 13 seconds.
About 14 minutes in, character imagines another couple having sex in various kama sutra like poses. Lasts about 5 seconds, only shown in silhouettes. No nudity, only sexual thrusting and noises.
About 30 minutes in there is a 10 second scene on a man appearing to masturbate, we only see from his knees down, no nudity.
At 38 minutes a man walk in on and then watches a couple have sex for about a minute. The couple are seated facing each other. Minimal amounts of nude female breast shown.