If you're sick and tired of hearing about your friends' great sex lives while feeling a little insecure because you can't seem to orgasm during sex, take heart.
It's not you. It's not your boyfriend. It's science.
More specifically, it's your vagina.
According to new research conducted out of Indiana University Bloomington and published in the journal Clinical Anatomy, the space between the clitoris and urinary tract has a lot to do with whether or not a woman can reach orgasm through penetration alone.
It seems if there's more than a 3-centimeter distance, orgasm from intercourse is pretty much impossible. If you fall into the lucky group of women who have a 2.5-centimeter gap or less, though, you're in luck: You probably get enough friction during sex to orgasm easily.
While more research needs to be conducted on this specific topic, it's worth noting it's actually pretty common for women to have a tough time orgasming from sex.
In her book "The Case of the Female Orgasm: Bias in the Science of Evolution," author Elisabeth Lloyd carefully analyzed 33 studies on orgasms over an 80-year period and concluded only 25 percent of women are consistently orgasming from intercourse.
As a woman, I have to admit this statistic is pretty depressing.
But, if you have a considerate man in your life, the two of you can get creative and figure out a few other ways to make it happen. It's all in the foreplay, people! I believe in you.