Stomach pain, in particular, often results from gas or deep penetration. the colon is pretty much the boundaries of what most people consider their stomach area (that is above your hips to below your ribs). I think typically having anal sex shouldnt cause pain higher up in your colon, but by good fuck, im guessing you mean pretty rigorous activity. At the beginning of this year, my boyfriend and i had anal sex, which we both found ok. some people do find that after anal sex, they may have a bowel movement. This is because rectal stimulation does increase the wave-like motions of the gi system called peristalsis. This is true of any stimulation of the gi tract- a suppository, a finger, a penis or an enema, for example. Experiencing a stomach ache after sex is perfectly normal many women have some type of abdominal cramping after intercourse, and, in most cases, the pain is benign and will go away quickly. If, however, you experience chronic or overwhelming pain, make sure you see a doctor to see whats going on and discuss treatment options. Anal sex is a bit of a taboo subject, despite the fact that its an increasingly popular sexual activity. As more couples explore this type of sex, understanding the risks, rewards, and proper. Serious injuries from anal sex are relatively rare however, if you have internal pain or see blood, you need to see your health care provider. Here are some of the potential complications of anal sex the blood you mentioned could have been from a hemorrhoid, which is a swollen vein in the anal area. You probably didnt learn how to prepare for anal sex in sex edand unlike p-in-v (or toy-in-v) sex, anal play does require some planning ahead. Theres a whole host of other gi troubles that might interrupt your experimentation with anal sex, like peptic ulcers (which can cause nausea, heartburn, and stomach pain), anal fissures. If a person experiences pain during or after anal sex, they can try using foreplay and plenty of lubricant to prevent pain in future.