Another really common cause is a hemorrhoid (yup, we're talkin' hemorrhoids, folks) you didn't know about. This is a bit more alarming, because a hemorrhoid holds a bunch of blood inside. You'll probably feel some level of discomfort or pain if you have a hemorrhoid, and if it bursts, you'll definitely see some bleeding that should totally subside within a few days.
While there’s no need to get uber-paranoid about the way you look, smell and taste – we’re all people with the same, sometimes-funky human parts, after all – a nice warm shower with soap is a good idea before you engage in any butt play. Lather yourself up with a mild, non-irritating body wash and scrub until you feel squeaky clean. You can even do this with your partner, for some built-in foreplay.
From the earliest records, the ancient Sumerians had very relaxed attitudes toward sex and did not regard anal sex as taboo. Entu priestesses were forbidden from producing offspring and frequently engaged in anal sex as a method of birth control. Anal sex is also obliquely alluded to by a description of an omen in which a man "keeps saying to his wife: 'Bring your backside.'" Other Sumerian texts refer to homosexual anal intercourse. The gala, a set of priests who worked in the temples of the goddess Inanna, where they performed elegies and lamentations, were especially known for their homosexual proclivities. The Sumerian sign for gala was a ligature of the signs for "penis" and "anus". One Sumerian proverb reads: "When the gala wiped off his ass [he said], 'I must not arouse that which belongs to my mistress [i.e., Inanna].'"
Reduce your risk of cutting or scratching your partner by trimming your nails. Long nails might tear the thin, delicate tissue of the anus, which could lead to bleeding. It also increases the risk of spreading bacteria that could cause infections. Be sure to wash your hands well and scrub under your nails after anal sex, too, especially before inserting them into the vagina or mouth.