A guy is sitting on a park bench and sees another guy walk by with a nice shirt and asks "hey, where did you get that shirt?"
The other guy answers "JC Penny".
Another guy walks by with a nice pair of pants, so he asks this one "hey, where did you get those pants?"
He, too, responds "JC Penny".
A few minutes later yet another guy runs up, this guy is standing there in his underwear, so the first guy asks, "Who are you?"
To this he responds "I'm JC Penny!".