However, by the time puberty hits, a girl's ovaries will house roughly one-third of those original eggs. Better yet, how much do you know about the opposite sex's reproductive system? While there is no bone in a penis, it is possible to cause serious damage — or penile fracture — to an erect penis. Go head-to-head, or just go it alone — either way, hopefully you'll learn something. You can fracture a penis. Better get to "exercising," fellas.
Consider it a karmic exchange for monthly periods. According to the Mayo Clinic , sperm ejaculated into a vagina can live in a woman's cervical mucus or upper genital tract for three to five days. Remember the grade school lesson that all squares are rectangles, but not all rectangles are squares? Test your reproductive knowledge below with this smattering of reproductive fun facts. Without regular erections, a penis loses smooth muscle tone and elasticity, and can shrink centimeters. However, female ejaculation is not what pornography belies it to be; the "squirting" phenomenon is actually the expulsion of diluted fluid from the urinary bladder, whereas true female ejaculation is the release of a thick, whitish fluid, biochemically similar to men's ejaculate. At birth, girls are born with all the eggs they will ever have: While the penis likewise provides pleasure, it also serves reproductive and urinary purposes. Menarche is a girl's first period, which most girls can expect to arrive around age While there is no bone in a penis, it is possible to cause serious damage — or penile fracture — to an erect penis. However, by the time puberty hits, a girl's ovaries will house roughly one-third of those original eggs. Only guys have nocturnal emissions or, wet dreams to the lay person. The clitoris is the only human organ that exists for pleasure. You can fracture a penis. Menarche is a type of butterfly. Better get to "exercising," fellas. A penis has more nerve endings than a vagina. So take the quiz and see how much you really know about your own reproductive system, and that of your partner. The penis follows a "use it or lose it" mantra. Ejaculated sperm can live in a woman's body for up to five days. You might be surprised to discover how you'd stack up against an average student taking a sex ed class. The same logic applies here. Mark your answers separately and check them below. According to the National Institutes of Health , female ejaculation has been on the records for some 2, years. Females are born with a lifetime supply of eggs.
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