First, I apologize if this would fit better in another area, but I can't really find a good fit for it anywhere.

How many of you have, at some point, mis-represented yourself online as being the opposite gender as what you really are? What reasons did you have for doing so? How long have/did you maintain the charade? Did it lead to any odd/uncomfortable situations?

I've never actually done this myself, and I'm not really sure why I'm asking. Idle curiousity, I suppose. Especially since traps/reverse traps seem to be the new hotness these days.