ok i admit that in this story my sister and i were being wicked childish. at the time she was 23 and i was 18. around the house she doesn't really care if her pajama pants sag low so i usually make a sarcastic remark about her panties/thong and how i should pants her to make her keep her pants up. well one afternoon she called me out on it, so i thought why not? so i gave her pants a tug and down came her pants exposing her butt and her baby blue lace thong in all its glory. i said "looks like you dressed up for the occasion" to be funny about it, but she took offense and said she didn't mean that i really should pants her.

the next night she had two friends over and called me into her room for something. as soon as i stepped in, i got pantsed. for whatever reason, i had some old red briefs on which had the girls in hysterics. at one point one of her two friends commented "oh my god! i think those are really panties!!!!" so i had those pulled down too after the comment. naturally i got a boner from all of the attention being paid which just increased the laughter.
for christmas that year, the girls got me an assortment of victorias secret panties with the note added "dress for the occasion next time!"