I had some sort of 'underwear' story kinda like that, in the first grade, but I really don't remember the details now.
In first grade (well all grades, who am I kidding) I was fairly sexual for a younger person, I suppose as in to say, I was well aware of sexuality and attraction etc. So I remember once being part of a group of 4 girls I think that put on a little dance show for the class, haha. Teacher allowed it, I'm surprised. We choreographed it at recess. It had a fair amount of booty shakin, I do remember that. Also, I remember in the third grade trying to make my shirt more 'revealing' by pulling it down, haha....wow.

My parents would have been surprised.
The meeting of two personalities is like the contact of two chemical substances: if there is any reaction, both are transformed.-- Carl Jung