Regardless, hairy men may not want to be shirtless with their in-law lest they recognize some uncomfortable commonalities. It also may be a result of sexual imprinting - that is, women select men who remind them of their fathers. The hypothesis is that women’s preferences in chest hair could be heritable from their mothers. Oddly, studies suggest your chest hair might resemble that of your father-in-law. Your Chest Hair Might Match Your Father-in-Law’s Hairy Chest