I don't remember my age, but I was fascinated by my mom's and sister's underwear drawers. When I knew they'd be out for a while, I'd sneak into a drawer and put on a bra just to see what it was like.
One night when both were out, i had gone into my sister's closet and put on just pantyhose and a dress (wearing men's underwear) and was checking myself out in the mirror. Unfortunately, the phone rang and my little brother, whom I was babysitting, answered the phone as I tried to run down to get it first. He saw me dressed as i was and actually said into the phone "You'd better get home, there's something weird going on", referring to me.