I Exposed Myself Young

I remember when I was 14 and my 13yo brother and a couple of his friends were talking about growing up. My brother teased me that I was still a little boy down there while he was not. I had little defence and said I wasn't as bad as he made out. He told his friends I was no more grown up than our youngest brother (11yo) and said he would prove it. He and his friends held me and pulled my pants down, while my youngest brother volunteered his services as a comparison. I was indeed no more grown up than him.