Ruki BDSM Forum Sig

Need some help with this one. This is suppose to be a signature picture for one of the mods on our forum named "Kaiju" and yes he's one kinky dude. If you don't believe me then go check out his fan-fics but make sure you have a bag of ice on your lap if you read his work ([link]). Anyway, he's a real cool friend and I wanted to do an awesome signature for him that I think he would like. However, this is as far as I got. I need an idea for the background of this girl and I figured who better to ask than my DA friends. He likes BDSM so it has to be along those lines.... Ideas?

Just so all of you know, I don't like tying up girls... I only like to kiss them and take their money.