MANHOOD MYSTERIES: Q: Why do his balls get tighter when...
A: They don’t actually get tighter, girl, though it does seem that way.
What happens is that when he’s erect, his balls move closer to his body.
Since his balls are holding all the sperm, they have to travel quite a long way for him to ejaculate.
They go through the deferent duct, up the spermatic cord, into the pelvic cavity, to the prostate, and then to the urethera for ejaculation.
Whew!
Oh, and this also helps protect his testicles from getting hurt during sex.
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