Kat -- This is actually a more interesting topic than you even imagine, from the perspective of evolutionary biology. Search "sperm competition" and you will find a wealth of interesting information. In the 1990's there was even the hypothesis that there were "real" sperm destined to fertilize plus blocker sperm and kamikaze sperm. Imagine that little aero-naval battle going on inside you! And you though it was just cum and a good fuck.
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LOL! Makes me feel proud as a male to be able to supply so much 'information' at such 'broadband speed' !
Kat -- This is actually a more interesting topic than you even imagine, from the perspective of evolutionary biology. Search "sperm competition" and you will find a wealth of interesting information. In the 1990's there was even the hypothesis that there were "real" sperm destined to fertilize plus blocker sperm and kamikaze sperm. Imagine that little aero-naval battle going on inside you! And you though it was just cum and a good fuck.
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