The virginity test!
Two Polish guys are discussing, one guy's upcoming wedding. "I'm not sure, whether my future bride is a virgin or not," says one guy to the other. His buddy replies, "Oh! There's an easy test to check that out. All you need, is some red paint, some blue paint and a shovel. You paint one of your testicles in red colour, and the other one in blue colour. On your honeymoon, if your bride were to laugh and say, "Those are the funniest pair of testicles that I've ever seen!", you bash her with the shovel, until she is dead!"