Carol's parents don't wear clothes in the show. They are seen naked showing her mother's breasts and her father's genitals.
Pilot has frontal nudity, male and female. As well as buttocks.
Carol has sex with a guy she met in a park. She takes off her clothes showing her breasts and then kisses.
In the seventh episode, a scene where a bunch of naked people appear on a beach is shown.
In the second episode, a BDSM orgy is shown quite graphically, although the scene is extremely brief.
In the eighth episode, a person is depicted rubbing sunscreen onto a naked person's buttocks.
In the ninth episode, teenagers are shown making out on a beach in close-up.