Who's Online

We have 143 guests and no members online

Star InactiveStar InactiveStar InactiveStar InactiveStar Inactive
 

After weeks of discussion of human reproduction, today we arrive at the main event: THE SEX. Hank explains the four phases of the human sexual response, how a sperm finds and fertilizes an egg, creating a zygote, and how different types of contraception work to prevent that from happening.

  • Last Modified: Saturday 16 February 2019, 08:37:10.