Although few cancers are totally preventable, avoiding risk factors and getting regular checkups are important. Using condoms may reduce, but not get rid of the risk of HPV infection. HPV vaccines (for those ages 9 to 26) have been shown to not only lower the risk of HPV infection, but also reduce the risk of anal cancer in men and women. People at increased risk should talk to their physicians about getting an anal cancer screening. During this test, your physician swabs the anal lining, looking at the cells under a microscope for anything unusual. Other forms of screening include looking closely at the area during a surgery, or in the office with a special scope to look in the anal canal. Early identification and treatment of precancerous areas may help prevent anal cancer. 

18. “OK. Imagine that you are a kid at school, and you get your school lunch every day. Every day the lunch lady gives you an apple and an orange, and then tells you not to eat the orange. So every day, you eat your apple, and leave your orange sitting on the tray. You love apples. Apples are fucking amazing, you love eating them every day. But every day, for weeks, for months, for years, while you’re eating that apple, there’s an orange right there, inches away, staring you in the face.You’ve never tasted an orange before, and you wonder what it’s like. Is it as good as an apple? Is it different or the same? Around you, you can see that a few other kids are eating their oranges; they seem to be happy about it. You have a friend who’s always going on about how awesome oranges are, how the orange he ate last week was spectacular. And you love your apple; you really do. But after years of that orange staring you right in the face, of watching other people eat their oranges and love them, you just want to eat the fucking orange and see what all the fuss is about.”
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When there’s a bunch of waste in your colon that needs to come out, your colon contracts and pushes the stool into the rectum, an 8-inch chamber that connects the colon to the anus. Your brain receives the signal that you need to head to the bathroom sometime soon, and your rectum stores the stool until you voluntarily contract it to push the poop out.
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.
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