Condoms are seen, discussed, and bought throughout the series
Characters are seen watching porn in some episodes, loud moaning is heard but nothing is ever seen
Some scenes with implied nudity, characters are seen skinny dipping, changing clothes, or being under some sheets. Nothing is ever seen other than extremely brief glimpses of the side of some women's breasts in certain scenes. Genitals are always obscured or offscreen.
Some scenes which involve strippers and strip clubs. Women are seen dancing in short skirts/shorts and crop tops.
Teenagers (portrayed by adult actors) having romantic/sexual relationships with adults is a reoccurring thing throughout the show. Might be uncomfortable to watch for some viewers.
Characters frequently have conversations regarding sex throughout the series which are at times quite lengthy. This includes virginity, masturbation, pornography, genitalia, libido, homosexuality, and methods of contraception. Some of the dialogue gets a bit graphic occasionally and there are some uses of sexual innuendos.
Frequent kissing/making out scenes throughout, at times laying down (occasionally in a bed) and passionately. In some of these scenes, the women are seen straddling the men or/and kissing their necks/shirtless bodies. Women are occasionally seen in their bras. Sex and oral sex are sometimes implied.