Talk about cutting-edge science. A new study conducted by researchers in Australia shows that women prefer men with heavy stubble over clean-shaven guys and guys sporting light stubble or full beards.

And what sort of men's facial hair do straight guys think is preferable among their peers? In the study, published in the May issue of the journal Evolution & Human Behavior, full beards and heavy stubble edged out light stubble and the clean-shaven look.