Beyond the obvious reason, like AN, it is my screen name for anything and everything else, that way I don’t forget my screen name when logging on to the various sites for porn, dating, swingers, cheating wives and any other place where there might be pictures of me naked.
Over time, I have been given the nickname “TG.” Not even sure who gave it to me but when spending time in the seedier part of the electronic world, I don’t use that nickname because it has a whole different meaning.