As an adult, how much do you know about sperm? Whether you're a man or a woman, sperm is a very important topic. I'm pretty sure we all know the basics: there are millions of sperm swimming in testicles, and it only takes one to swim to a woman's egg and impregnate her. But what else? Did you know that sperm can live inside a woman for two days? That if she has sex, there's a chance she won't get pregnant until two days later? There are a lot of facts about sperm that I'm sure you don't know or haven't even heard of.
Source: Twitter @contraline
Here are other things you didn't know about sperm.