dunno... i have had some things like that too.
as to why - could be because you were "acting out"... could be you were being very "sexualized" because ... only you can answer that one. for me it was because i was dealing with what was happening at home. if i acted out against my abuser, i would have been crushed into a pulp... or, depending on his mood and my actions, i might have been ridiculed beyond reason and made to feel great shame at the expense of what i meant to my family... or rather, what they meant to me, seeing as they clearly didn't treat me with respect.
i have things that i look back on and it scares me to think were abusive to others... and may qualify because i was "3 years older", as states the law. and why were those younger kids acting accordingly with me? probably because they were also dealing with the c*** that was going on in their own families. who knows. Did i do it with intent to harm? no. did i even know what i was doing? not really. Did i know it was wrong? yeah - because i knew myself to be bad... which of course, i now have to work on in therapy. *sigh*. it is all so confusing, isn't it?
it even scares me to post this because i might be alienating myself from others that i trust in here.
=(
but i think that it is all part of growing up in a messed up family system in a country that is very puritian based which may lead ppl to act out in ways that they wouldn't if they didn't already feel a sense of shame around themselves.