Looking to add some naughtiness to your love life? Make it a night to remember with Ball and Chain's I.O.U Naughty Heart invitation panties, the perfect way to initiate your next sexual encounter. How to Use: Slip on your sexy panty and then tie one or more IOU's to the front bow. Greet your lover wearing the panty along with your favorite bra, pasty set, camisole, or nothing at all. At that moment, ask your lover to open the I.O.U invitation(s), revealing yet another wild surprise.