When a guy is sexually excited but doesn’t ejaculate (cum), he sometimes gets an achy feeling in his testicles and lower abdomen. The slang name for this is “blue balls.” This happens because the blood that has rushed to the genitals to cause the erection takes time to move back out of that region. The name comes from the myth that a guy’s balls will turn blue and fall off if he doesn’t ejaculate. It might be uncomfortable to have aching testes, but there are no long-term health risks. Eventually the erection goes away, or the guy ejaculates and relieves the pressure.
Girls can get a similar feeling if they don’t have an orgasm after sexual arousal. It may be a less severe feeling, but since guys’ and girls’ bodies both respond to sexual excitement, it makes sense that it would happen to girls, too.
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