I like big MHC's and I cannot lie

This is from an article from health.com about how love changes your body chemistry, like releasing endorphins, oxytocin and other things like that.  Well, one of the last blurbs was about how we can (on a cellular level, in a way) detect genetic variances in partners.  This makes sense in an evolutionary (Mendelian) sense, in that more diverse mates make hardier offspring, but seriously??  And this isn't even a science journal.