So one day you’re staring at your balls after sex (and really, who doesn’t?) and realized they were moving by themselves. WTF?! Was that an optical illusion or do the boys have a life of their own?
The movement is what experts call “testicular circulation”—blood coursing throughout the scrotum via the veins and arteries.
Remember, testicles are sperm factories and they’re heat sensitive. Sperm need to be kept at a certain temperature or they’ll start dying like flies in a jar—slowly and painfully.
When the “boys” get cold, they snuggle up and get warm. When they’re hot they hang lower than the scruples of a sex columnist looking for his next bump.
Want to try a cool experiment? Make the boys dance. Next time you’re in bed with a girl (or a guy)–and if you’re like the rest of my readers, that should be in about 10 minutes– have your partner touch the upper inner portion of your thigh.
Watch closely as your testicles move in the direction away from where their hand is touching! It’s like your balls have a mind of their own. You know, like your dick. It’s called the cremasteric reflex. It keeps the boys out of harm’s way. When the “threat” is over, the testicles will come back to whatever position they feel safe in.