I was riding a motorbike with my bf. I was wearing a loose skirt and a pair of thong underneath and no bra. As my naked crotch was rubbing against the seat from time to time I pressed my loin tight on the seat. OMG! the sheer vibration of the motor and the speed was sending sensational trickle against my crotch and I lean forward a bit resting my b**** against my bf's back. Soon I reached a mind-blowing o*****. I had to ask him to stop to get grasp of my breath!