A microscopic species of bees known to harvest cum in the developing testes of humans and thereby cause their descent from the abdomen (i.e., the reason your balls drop).
"The doctors had to surgically move the undescended testes to the scrotum after an intravenous swarm of cum bees failed to yield results."
Usage note: Not to be confused with Cumby's
"Man, I really need some cum bees"
"Yeah, me too. Let's go. They have a new Spongebob Squarepants slushie flavor that I really wanted to try."
"No... I mean my balls never dropped."
"Nothing, let's go to Cumby's"