For years my sister and I would hold our brother down and hurt his balls so much that he would cry for mom to come save him but she not once made us stop. My sister would force his underwear out of the way while I would knee him and she would hit him. It was fun and it REALLY turned me on but as an adult I have a kink now about getting my vulva and clit smashed the same way. I really want my brother to do it to me as revenge since we're grown up but I don't know what it would take. I've let him see me in my panties quite a lot and even tried taunting him but he doesn't seem interested in it. I don't know what it takes to get guys interested in that.