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Blue Balls: A Ball-Faced Lie?

Science Vs

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The Effect of Ejaculating on the Penis and Testicles

When you ejaculate, the body is like, all right, I don't need all this blood in my penis anymore and the blood drains out so the penis gets all limp and weakly again. But if you don't ejaculate under this theory, the blood might still leave the penis, but then stay in the testicles. So there's a huge pooling of blood in these areas just then squishing on everything in there. And as for why this might end up being painful, well, think about it like a stuffy nose.

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