Nos Tempos da Vaselina (1979)

Starts with these two young dudes, both looking like they just rolled out of bed — short messy hair, slim builds, one white, one brown. They’re outside near some rocks by a river or waterfall, just kissing and feeling each other up. The camera’s low angle makes it look like they’re in their own little world. Then they drop trou, and it’s all mutual jerking and grinding, no hesitation. The brown guy ends up bending over a rock, and the white guy fucks him raw — no condom, just straight-up pounding. The outdoor setting’s a nice change, and the lighting’s natural, so you see everything. No fancy editing, just two teens going at it like they don’t care who’s watching.