I mean when they look at you right in the eyes and do a slow sensual lick across their lips. My girlfriend was horny the other day when I was getting ready for bed and was just wandering around in just my underwear and she walks up from the living room and looks at me as I am coming out of the bathroom after brushing my teeth. She stops just before going towards the bedroom and looks down at my underwear and back up to my chest then looks me in the eyes and gives a slow lick across her lips. All without saying a word. I had an INSTANT hard-on!!! and the rest as they say is history. Why does this simple act arouse men so much? I find many guys feel the same way when a woman licks her lips like this its enough to drive any guy crazy, I just never really understood quite why. I know its hot but like why is it SO hot?