5 strange things that — really! — can increase your risk of STIs

Hopefully, you already know that the most effective way to prevent a sexually transmitted infection is to avoid unprotected sex. But there are a few other, less obvious things that can affect your risk of contracting an STI that you should know about. It should be said up front— none of these things have huge, definitive effects, so don't freak out if they apply to you.

But it's still interesting to know what scientific data has found, and it can't hurt to tweak some of your current habits to reduce your risk, right?

More from Glamour:
What's That Salad the Kardashians Are Always Eating on Their Show?
Ryan Reynolds Reveals He Fell in Love With Blake Lively While on a Double Date With Someone Else
34 Times Kate Middleton and Prince William Gave Us Major Relationship Goals