Are you a crazy, extreme couponer? Show the world your love of coupons with this cute "I Coupon, Therefore I Am" shirt! This fun twist on 17th century French philosopher René Descartes' famous "explanation for it all: I think, therefore I am." quote lets people know that couponing is an essential part of who you are. This shirt says that you aren't embarrassed by your couponing skills but are instead proud of your bargain hunting abilities!