When I was a 15 year old boy my big sister took off my clothes with the help of three of her female friends in the basement of our building. She wanted her friends to see me get a hardon and hid my clothes to keep me naked. I was so frozen with embarrassment, they yerked my dick so much I came all over the floor. I was so embarrassed they would tell other kids from my school, I let them do it. I had to go down there every time they wanted to play with me.