I would love to take you over my lap and pull down your white panties down to your thighs and spank your sweet ass. I would start off soft and grab a handful of your cheeks between each swat, feeling your soft buttocks. Then I would smack a little harder, feeling my cock get harder while your butt cheeks started blushing a rosy colour. I would do this until you begged me to stop or keep going.
Nothing hotter than a girl bent over your lap nude while you are dressed. Nice firm groping of her round ass followed by a good smack. I'm also a fan of giving that pussy a nice gentle rub then smacking it.