Last Saturday night at my house, I had about seven girls spend the night at my house. My parents are divorced and I live with my Mom and my brother, who is 12. My brother is very open with mom and me with his body.
These girls age range from 12 to 15. We use the living room to sleep on the floor. We were watch television and my brother was in the bathroom taking a bath. We only have one bathroom. In the hour my brother was in the tub, most of the girls needed to use the bathroom and saw my brother in the tub. They were curious about what they saw and after he came out with a towel around him, my mom called him and asked if he would mind if the girls did some exploring of his body. He agreed and got in the center of the group and lay on the floor. He undid the towel and took it off. Each girl felt his penis and testicles, and watched his penis change in size and shape. We asked him how boys masturbate. He was very open with it because he does in front of Mom and me and sometime when we watch television and we are sitting on the sofa. Well he showed the girls how he does it and they got very exited about how the sperm came out.
Afterward, all the girls got naked and let him see them and he got to see some masturbate also.