I touched stranger's butts when I was six.
Why did you want to touch people's butts?
I loved to watch them jiggle.
As a child, you probably didn't understand consent. But I assume that you do now and know that you should never touch other people without their consent. You could get in trouble otherwise.
I just want to touch my future girlfriend's butt, I don't think it is abusive.
Even if you are dating someone they might not like being touched that way. It can be quite embarrassing or socially inappropriate if you decide to do it out in public. Not everyone is ok with thins kind of behavior.