I tried fiting a bowling pin in my anus. no bleeding or fever or anything but just abdominal pains the next days. could this have to do with prostate?

Other possibilities: While it is possible you bruised your prostate, it is also just as likely you injured your intestine even without bleeding/fever. If you are having abdominal pain yet, i implore you to seek medical evaluation. Let them know what happened - we've heard much more than what you did and the docs need that information to get the full picture and evaluate properly. The injury has potential to be serious.

I have read the: Responses you received from providers on the 3 questions you asked. I hope you are able to appreciate the level of concern by the physicians. Self- destructive behavior should be avoided whether in the quest for sexual excitation or not.