Learn how to prevent the 5 most dangerous sex mistakes that disgust your man in my discreet newsletter. However, actually acting on those thoughts is a different thing altogether. Hey, it happens! If your BFF is a woman, you might have a whole other slew of issues to deal with.

Best friends are hard to come by. These are people in your life who you've grown to trust, value, and love, likely for years. But what happens when that last L-word, love, turns into another: lust? Is having sex with your best friend actually a good idea? Compared to people who meet as strangers, Cocharo says couples who start as friends—especially best friends—have a much better foundation.

Obviously taking friendship to the next level tends to go wrong for a lot of people, for us, it made our friendship even stronger. It made me realize how much we trusted each other. Because we had an already established friendship, there was a huge amount of trust between us and this was clearer than ever when we had sex.

Okay, not ALL of us, but most of us. It happens. Well, have you ever had sex with your friend? Now that could be bad.