Spread Eagle

My first ex was very much into bondage, he would lay me down on my back, blindfold me and tie my wrists to the back of my thighs right at the knees. This would force me into a helpless position where I was wide open with my pussy as fully exposed and spread as possible.
He would then so patiently and with so much calculation, tickle, pinch and tease me, he was so meticulous and often would make me beg to stop or finish. The thrill of being spread, blind and helpless while he slapped my pussy rubbed his cock up and down it, licked it and penetrated it still gets me instantly off till this day.