Okay looking for a certain scene. A hot blonde young woman, guy tries to make her cum but she never does until he spilled some milk on her by accident and she goes off like a rocket.
It either some kind of teenage movie like Lemon Popsicle with a nudity but nothing hardcore, or maybe something around a german softcore sex comedy. It probably a 80s to 90s Movie.
If I remember correctly the Blonde was really hot but that milk scence probably was the only topless scene of her in the movie, not sure though.