Summer: Dude, does that guy just have one testicle?

Jake: Uhh, probably not?

Summer: But look, it's just one big ball under his dick! That can't possibly be normal!

Jake: No, no, his scrotum is just contracted. Plus it looks kinda small to begin with, so his balls are probably just filling it up completely, making it look like one big ball. 

Summer: Weird! Tho I guess I kinda remember something about that from anatomy class. Temperature control, right?

Jake: Yeah, I guess. Look, my balls are kinda doing it a little now too. 

Summer: What, really? Lemme see.