I am 20 years old and I thought that I knew everything about sex. However, today in human sexuality I learned several things I had never known before. Like did you know that a girl can get pregnant BEFORE she ever has her first period. Also the average age for a girl to begin puberty is 8.5-15! Holy S. Then, here is my favorite one...Guys, no more B_ing and yelling at the girls because guess what, YOU HAVE CYCLES TOO! That's right, men have cycles just like girls do, only not as frequently. Plus, their mood swings are complete horniness followed by extreme moody attitudes. So gilrs, the next time your man gives you S about PMS or being bitchy, you can tell him he is just like us!!! More to come later as I learn more!!!