The main character is stripped, held down by teammates in the locker room and has his pubic hair shaved as an initiation. Nothing is shown but could be disturbing to some viewers.
Toward the beginning of the film, there is a brief scene where sex is strongly implied, but no body parts are shown.
Also, toward the beginning, we briefly see Dean's buttocks and the outline of his crotch in his jock strap after coming out of the locker room.
There is a fairly intense sexual scene later on in the film with Dean and Jessie, where bare breasts, genitals and buttocks are seen.