If your partner wants to prove they’re as big as they say they are, there’s a condom for that.

They evolved to do and say whatever they have to, during those moments they’re aroused, to not use a condom. That’s how reproduction works, after all.

You know a lot about the food you eat and the pills you take—shouldn’t you know about everything that goes inside your body? Here are 15 things you didn’t know about condoms.