Not visual but sometimes graphic in description. Reference to "boning" someone's mom. Another reference to spreading rumors that someone has chlamydia.

Opposite and same sex kissing. Some of the girls and boys end up having sex, although no nudity is seen. Just the lead up.

There is a poster of a naked woman in episode 4 in one of the boys bedroom. Not full frontal nudity, only breasts are seen.

Several f bombs along with several other swear words.

Some episodes did not use f-bomb. If I remember correctly, every episode used profanity in some form.

Within the first 5 minutes 5 f bombs

Several instances of teenage partying and drugs and alcohol