A couple of episodes explore the sexual assault theme which could be triggering.
Some sexual content including crude references and a few scenes of sexual activity. A couple is shown having sex from behind while moaning (no nudity or graphic detail; the expression on their faces seen). Some dialogue about sexuality between teens.
brief female rear nudity
Quite graphic oral sex is displayed.
There is zero nudity of characters in season 1. Some female actors are seen in their swimsuits or underwear, nothing explicit. A few scenes where sex acts take place (oral sex, sex between male/female, female characters kiss, etc), but it is brief with no nudity and camera pans away.
Because some of the information listed here is contradictory, to clarify - there is brief full frontal male nudity in season 1. A teenage girl shows a teenage boy a photo of a naked man. The picture is clearly shown for a second before it goes out of focus and the girl puts her phone away. Very brief but graphic.
When playing 'never have I ever' the game takes a very sexual theme, with a lot of questions about sex and threesomes
Two brief instances of full frontal nudity, one male and one female. Several scenes of hand play and mouth play that show "everything except the very worst". (Deleted. Personal opinions about content are not appropriate for the Parents Guide.)
Season 1 - A photo of a topless woman is seen on an iPad. Bare breasts are clearly visible. The same episode has an out of focus photo of a nude man but does not actually show the tip of his privates.