I am quite used to seeing my girlfriend walking around in just her panties in the morning its not really a big deal but whenever she acts goofy and teases me she will jump up and down on the bed in just her panties acting girly and cute. Its actually cuter because she's so tiny she is 5 foot 3 weighing about 95 pounds and the bed hardly shakes when she is bouncing up and down. What is it about this simple act so many guys find sexy? my male friends all agree when their girlfriend acts silly like that they love it! why?