An adult teen male has his girlfriend over at nights. On one occasion the sound of his bed thumping keeps others awake. Once, the couple are seen in towels obviously having showered together. These scenes are short.
Twelve-year-olds, a boy and a girl, kiss romantically for several seconds.
Conversations and scenes of people emerging from bedrooms show that various middle-age couples and an older couple, all one-on-one male/female, are sleeping together. One woman announces she is pregnant. An unseen friend is implied to sleep around.
A man in a bubble bath shows arm motion that may have been masturbation, but this lasts about 3 seconds and is not at all certain.
There are occasional brief mentions of love and sex by kids: that a dad is "screwing" a woman; that a large TV will be great for watching "x-rated" movies; that a boy and girl are in love. A younger child is told that parents are "playing doctor", which is a "game for old folks."
In non-sexual situations, adult women are seen without shirts, in bras, for a few seconds once or twice, and men are seen without shirts. A father criticizes a 14-year-old's shorts and mutters about how he looked at girls when he was that age.
A painting of a woman shows full frontal nudity for several seconds. Later a girl covers the painting's breasts and bush with post-it notes, which remain in place for the rest of the film.
A 4-year-old boy is shown on a toilet, and a slightly older girl says "I see your pee-pee", but his clothes hide everything -- nothing is seen. Another scene shows these two in a bubble bath, in their underpants, splashing each other and a parent standing outside the tub.