Heat Wave (1977)

Alright, so this starts with a hot blonde holding up some weird eye drawing, but it gets real quick. The brunette—petite, wavy hair, visible tats—ends up on a mattress getting her pussy licked by a dude with messy brown hair. He’s not holding back, either; you can see her legs shaking a little. Then the scene shifts to what looks like a classroom, with a whiteboard in the background. The same brunette’s on her knees sucking off a guy with glasses while he pretends to teach or whatever. The camera gets right in there for close-ups when he goes down on her again, this time with her legs spread wide. The lighting’s dim but you still get a good look at everything—no complaints there. The blonde pops in later, but the brunette’s the star here with how into it she is.