Are you guys just foolin' about how sensitive your manbits are? I think you are.
My little sister definitively trounced me in the only real physical fight we ever had. She's 9 years younger than me, so I was probably about 15 or 16, and thus way too old to be teasing her about dumb stuff anyway, but regardless, this is how it went down:
ME: tease, tease, tease, say something nasty, tease, tease, tease
HER: -swift kick to the balls-
ME: "urlp!" fall to the floor, almost puke, try rly hard to remember that now that she knows what to do, teasing is dangerous from here on out...
It ain't no joke!