Tired of having the wrong kind of person buy you drinks? Maybe you're a straight boy, but just a little effeminate, or a girl who's kind of tough. Or maybe you just need to have it written on you to remind you every once in a while.
For anyone who's ever had to say anything like "Uhhh, well, I'm flattered, really, but you see I'm not like that." A bargain at ten bucks, considering the trouble it could save you.