when i was 12 and my sister was 16 we used to wrestle a bit on our living room floor, it would get intense on occasion because we're both quite competitive. well one afternoon we had an especially intense match, it lasted roughly 20 minutes before i managed to pin her. i gloated after my win for a while, much to the dismay of my sister. later that night she had two friends over so i thought "hey, why not show off in front of her friends?" so they were watching tv when i waltzed in and proclaimed my sheer awesome victory by making fun of my sister for getting beaten by her smaller younger brother. so she started to get embarrassed in front of her friends, which i noticed so i kept going. after about 5 full minutes of gloating, she pounced. we started wrestling a bit, until she really started to overpower me. she had me pinned flat on my back, and started her own bragging. well i started to struggle to get away, when one of her friends pointed out that she could see my underwear. so she jumped off the couch and said "let's find out what the baby brother wears" and she pulled down my shorts to expose my faded red captain planet briefs. these nice underwear had the indian member of the crew with the "heart" portion of the rings. so her friend proclaimed "THE BABY WEARS PANTIES!!!!" which made the other friend come look to see, and my sister let go of me to turn and see if this was true.
i managed at that point to scramble away, but not to endless laughter that, to this day 7 years later, i still endure.