Parents Guide for
Blow-Up (1966) More at IMDbPro »Blowup (original title)

Although it's not rated, if rated today it might be:

R-Some Sexual Content/Nudity, and Brief Drug Use

Sex scene involving two topless women and one man; brief glimpse of both women's pubic hair. A woman removes her top, exposing her bare breasts, in an attempt to entice.

Story involves a possible murder, but no violence is shown, and there is never any real evidence as to if the murder ever actually happened.

Party scene were pot smoking is abundant