Sometimes you don’t wanna rehash the entire Star Wars saga when your girlfriend asks you who Darth Vader is. Instead, simply take off her shirt. Oh, and put one of these Pop Culture Math Equation T-Shirts ($15-20) on her instead. Milan-based designer Matt Cowan has a nifty line of shirts that simplify everything from the origins of the Fantastic Four to Johnny Depp’s many roles–all through the power of math and art. Now the day they come out with an equation shirt explaining The Notebook… that, is the day you go topless.