Why am i bleeding from the anal sphincter?

okay, I'm not homosexual, and when I go #2 my butt drips blood, it's been going on for like the past week, the first time it happened i was checking for the hell of it and yeah, my eyes got all wide and i thought to myself. . . "I'm not supposed to do that." It doesn't like pour blood, but it drips a few times and I really dont think that should be happening.