The Sex-Ed class you never got in school! Why do men tend to wake up with "morning wood"? We look at the hard facts and some of the biology of an erection, to discover the mechanism behind this phenomenon.
6 months 1 week ago • 1,481 views • 2:06 6 months 1 week ago • 1,481 views • 2:06playlists with this video:
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