C’mon Baby Light My Fire (1969)
The couch foreplay is short but intense, with the male leaning over the brunette. Both the male and female performers are slim. The girl bends over on a bed. The male performer goes in deep, and they fuck hard. She rides him a little later, but it’s the doggy style that really stands out. The room is dimly lit, but the camera gets close enough to see all the action. There’s a second female performer involved, though it’s more about the guys sharing the brunette. Solid blowjob action between switches.