sloppyredditor t1_isfokt8 wrote on October 15, 2022 at 4:57 PM Reply to TIL: Sperms were thought to move by wiggling their tails side-to-side, like eels, for 350 years. But research shows that they roll as they move forward like a spinning top. by vect77 TIL my penis has a rifled barrel Permalink 364
sloppyredditor t1_isfokt8 wrote
Reply to TIL: Sperms were thought to move by wiggling their tails side-to-side, like eels, for 350 years. But research shows that they roll as they move forward like a spinning top. by vect77
TIL my penis has a rifled barrel