In a shower scene, there's a bunch of women that are seen fully naked, a man pulls down his pants and sticks his penis through a peephole, and a woman grabs it, it is barely seen, only parts of it are seen.
There is a scene where a bunch of men strip down naked in a shed, and some of the men's private parts are barely visible, but later in the scene they all run outside, we see a lot of male frontal nudity, but the whole scene is in darkness, so a lot of it is in shadow.
In a stripclub scene, a stripper flashes her breasts.
At the end, a woman pulls down a man's pants, rear nudity visible, frontal is covered.
There is a sex scene between two teachers, partial nudity seen, the moaning can be heard from the gym, but the whole scene is played for humor.
A man is having sex at the end of the movie, no nudity seen, but he runs out to get a condom.
There's a scene or two in a strip club, women dance seductively, only partial nudity.
A man is running around with an oversize condom, he blows air into it, then runs around with it but gets caught by the gym teacher.