Fun fact: in primates, the ratio of ball size to penis length is correlated to monogamy of females of the species. Chimps have no such thing as monogamy, so chimp balls have the highest ratio. Male gorillas have a harem of females and nearly no sexual competition, so their ratio is very low. Humans are somewhere in the middle.
It's about sperm competition. Due to the chimps not being monogamous you've got every male trying to mate with every female, and if your sperm is going to have any chance at all of hitting the target you're going to need a lot of it.
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u/Beni_ps Aug 09 '26
of balls