Ever wonder why you find yourself with the wrong guy ladies? Turns out you may not just be stupid, but rather affected by your birth control pills.

Birth control pills could screw up a woman’s ability to sniff out a compatible mate, a new study finds.

While several factors can send a woman swooning, including big brains and brawn, body odor can be critical in the final decision, the researchers say. That’s because beneath a woman’s flowery fragrance or a guy’s musk the body sends out aromatic molecules that indicate genetic compatibility.

Major histocompatibility complex (MHC) genes are involved in immune response and other functions, and the best mates are those that have different MHC smells than you. The new study reveals, however, that when women are on the pill they prefer guys with matching MHC odors.

“The results showed that the preferences of women who began using the contraceptive pill shifted towards men with genetically similar odors,” Roberts said.

This study really opened my eyes. Here I was thinking that the only type of pill that impaired women’s judgment were the ones I bought from that dude at a frat party but apparently my drug dealer Sparky was blatantly false-advertising. It’s shameful how much they get away with.

Anyway this is a genetic thing so there’s no real way to take advantage of it men, so don’t go running around dipping your genitals in tuna yet. Unless you have a cat. Then we call that love.