This has to belong in the “well duh” file.
Well-hung males may enjoy an evolutionary advantage over their less well-endowed competitors - in certain rodents, anyway. The finding may help answer the vexing question of why penis size is so variable among mammals.
It pays to be well hung, if you’re a rat - sex - 26 February 2007 - New Scientist
The obvious question that comes to mind for me is… what unfortunate graduate student got the job of measuring penis size in rats? Or testicle size? And while I’m at it, how precisely does one measure testicle size? Inquiring minds want to know.
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