We all have our own ‘odor print’ – just like we have finger prints. Odor prints are part of a region of genes referred to as the major histocompatibility complex (MHC). Women are more likely to choose men with an MHC scent that is different from their own. In fact, they can basically smell genetic compatibility with a dude.
In two bigs studies run by Dr. Rachel Herz, an olfactory expert at Brown University, female participants ranked a man’s odor as the most important feature in deciding whether or not they would want to have sex with a man.
So yeah, damn, opposites attract – at least when it comes to smell – and it’s actually Mamma Nature’s way of helping us produce super duper healthy babies. And guess when a woman can smell these genetic codes best? When she’s ovulating.
In these studies that they did, they got a bunch of dudes to wear the same t-shirt for a couple days in a row and then they put the shirts in identical boxes. A bunch of chicks were then asked to smell the shirts and say how sexually attractive they thought the men would be based on smell. The results were that the women were most sexually attracted to men with a MHC dissimilar to their own, while they ranked those with similar MHCs as “brotherly” or “fatherly.
In another study, 56 percent of women said they wouldn’t fuck a dude who smelled like their dad. Um, yeah, thank god.