Movie from the late 70's with murder and sex

[susansfb]

I can only remember a small scene of this movie, but it was pretty graphic.  The two main characters of the movie are two young males.  They meet a woman (possibly a prostitute) and bring her to an apartment.  One of the guys starts having sex with the girl on the sofa, and while she is on top, the other one gets really angry, grabs the woman off the other man and strangles her to death.

Thanks for any help :) Been thinking of this movie for YEARS!

[retrorussell]

What country of origin?

[susansfb]

I would say American.