Here is my situation: My b/f and I had anal sex, and this was not the first time we've done it. But this time was different. After we were done I noticed there was something that kind of just popped out from my bottom. It's like a piece of your skin or muscle or something. I kept trying to push it back in, but it keeps coming back out. It doesnt cause me great pain, but just a little bit of itching sometimes. What is it? What should i do with it? Is it bad? Please let me know. Thank you.