@notawerewolf: Actually, the testicles are supposed to stay inside the scrotum. The condition is called "Retractile testicle" and it's an abnormity, albeit a benign one. The external inguinal ring is usually too narrow for a fully grown testicle to pass.

NotMeNotYou said:
The condition is called "Retractile testicle" and it's an abnormity, albeit a benign one.

Yee, and a fairly common one. I wouldn't complain if it save the boys from danger lolol