Probability Of Getting You Laid: 0%

Let's start this off with a no-brainer. Most women love a good sense of humor, but thinking that anyone is going to look at the gag on your T-shirt, chuckle, and try to get to know you better is simply delusional. You could be the most intelligent, funny, charming dude, but if you don't cover up your fratty/nerdy T-shirt with something else, ain't no one gonna give you a second look.