So back in January, we told you about a male affliction called “post orgasmic illness syndrome”, and how researchers think it may be caused by an allergy to semen.

Well, men, don't feel bad. Some of us ladies are allergic to your sperm, too.

It's called “human seminal plasma hypersensitivity”, and within thirty minutes of exposure it can cause redness, swelling, itching, hives and even breathing difficulty. Similar to latex allergies, the cause is the proteins the sperm travels in, and not the sperm itself. And unfortunately, ladies, if you're like Leticia Ortega, a 36-year-old woman from Fort Worth, Texas, you may just randomly develop this allergy at some point in your life. She has the problem with her current partner. She didn’t have it when she was married.

“The allergist said that I either became sensitive,” she said, “or because I was married for so long, I was used to his sperm.”

Reactions can be prevented through the use of condoms, but there's a better way, physicians say. It's done by isolating the proteins in the male partner's ejaculate and testing the female partner by applying each to her skin. Once they've determined which she's allergic to, they inject her with a small amount so her body will learn how to fight it, like with bee sting allergies.

You just know some schmuck's gonna use this as “proof” that sex is bad, mmkay?