Answers (3)
Guys fall in love with their eyes because they often evaluate a girl's capacity to bear their children... If the girl met their criteria, it's all instinct, their own law of evolution... that's why they prefer girls with bigger boobs, wider hips and prettier face... the same way the girls like guys with hunky body... (their capacity to protect her and her babies from others)...
It's evolution and it's engraved in every guy's DNA... us girls, too... :D