What does it mean to show your feet?

Question

on justin.tv people always ask to see your feet. why? is this some gross joke or something?

Answer 1

I think they're just trying to be original, and do something that hasn't been done before...  

Answer 2

I have never seen justin.tv, so I may be way off base here.  But do they phrase it this way: "Where's the feet?"

If so, then look at the initials of those three words.  Think of another, somewhat less socially acceptable phrase that those letters usually stand for.

That's what they're really saying.