There are strong sex references throughout
The film opens with Nick and Caitlin having sex; his buttocks and the side of her breasts are visible. She then tells him not to 'cum inside her' and they discuss were he should ejaculate however during the conversation he reaches orgasm and accidentally ejaculates onto his clothing; a brief shot of semen landing on the clothing is shown
In a later scene, Nick's mother confuses the semen stain for a toothpaste stain and rubs it off with her finger; she then places her finger inside her mouth and appears disgusted
Nick masturbates under his bedsheets briefly
DJ Hammerhead is shown in bed with multiple women; sex is implied
Robin advises Nick and Shane to wash their foreskins during the festival; telling them the cautionary tale of how his friend caught septicaemia and his penis had to be removed
In order to avoid a ticket inspector; Shane, Nick and Lucy pretend to have sex in the toilets - strong sexual language is used.
Nick and Caitlin discover some sex toys owned by another character
While attempting to retrieve a character's phone; Nick is urinated on by a stranger in a crowd - the man's penis is somewhat visible
Caitlin and the Pirate have sex; she moves her head down toward his crotch before bobbing her head up and down implying oral sex; he then moves her onto her back and begins to thrust into her from behind. The sex is interrupted before anything further happens.
Shane and Lucy find themselves at a Druid marriage ceremony between a man and a goat; it is then implied that the man has sex with the goat in front of them - however there is no strong detail of this and the scene is relatively discreet in nature
Nick and Smurf Girl have sex inside a car; there is some moaning and partial breast nudity as she rides on top of him
Nick discovers a large tattoo on his buttocks; which are visible
In an attempt to find Smurf Girl's location Nick and Shane agree to perform a public striptease for them; we see shirts and trousers being removed before the police intervene. A chase then ensues which results in Nick's underwear coming off although a conveniently placed Ice Cream cone masks his genitals.
Nick imagines his potential future with Smurf Girl in a dream-like sequence which turns depressing; we see a suggestive Minion picture and sight of them beginning to have sex in a courtroom the scene ends before anything further happens.
Despite some partial shots there is no female nudity show in this movie.