Once ever.
I am 6'2" and was at the time 19 and a stacked 205 with relatively skinny legs / always had that problem (natural, no ped's because I didn't hang around with that crowd)
I was getting something to eat and I told my little brother (12 at the time) to get out of my way and he didn't like that. So my little brother decided to drop some bombs on my back as I was making a peanut butter and jelly sandwich. I was so pissed off, I turned around and grabbed my brother by the throat and pinned him against the wall and said something to the effect of "mother fucker you ever punch me like that again and I'll kill you".
I let my brother go and my dad (5'9" 160 lbs.) came over and bitch slapped me and said "you never talk like that to anyone in this family"........and he was right so I took it and walked away, locked myself in the bathroom and cried because I was such an asshole......true story.