Guy 1: I burned my right hand pretty bad yesterday.
Guy 2: That sucks man, guess you won't be spanking it for a while.
Guy 1: Nah dude, I can still do it with my left hand. I'm ambifapstrous.
Person 1: It's so hard to choose whether to fap with my left or my right hand...
Person 2: You can use both???
Person 1: You can't?
Person 2: Dude, you're so lucky you're ambifaptrous.