
If your
period has ever been late, you know how scary and stressful it can be if you're not trying to get pregnant. Knowing some basic facts about sperm and the male body can help prevent an unexpected pregnancy, or help you avoid the anxiety of worrying that you are pregnant. So take this short quiz to make sure you're up on your sperm smarts.

A while ago, I answered a question about a woman who was dating a
guy who lost both of his testicles in a car accident. It wasn't clear if this man could have an erection or an orgasm, but that post brought up many questions about orgasms and how it's possible to have one if you don't have any semen.
Here's the deal.

I'm sure you've heard that men shouldn't hang out in hot tubs because it can affect their
sperm. Is this true or a myth?
Earlier this year, a team of urologists at the University of California conducted a
study to test this speculation.

DEAR E. JEAN--
When I saw the
Dear Sugar quiz called “SEMEN: What Do You Know,” it got me wondering. I’m very vain about my figure.
Lately I've been getting a lot of comments and questions about sex and semen, so I just wanted to clear up some things.
Let's test your knowledge on this fun and important topic...