Hi, my name is james. For 8 years I ve been lucky enough to be flexible enough to perform auto-fellatio. The problem is, usually afterwards, I have problems using the restroom. My stool comes out really thin, or very little comes out all, and on some occasions I go for days being constipated. I feel back pain on my lower back, and I m thinking that has something to do with the strenuous amount of stress that I put my back muscles through, when I perform auto-fellatio. So I m wondering if maybe my back pain can cause problems for me attempting to poop? From my own observations- My anal opening seems not to want to open up all the way, which could maybe contribute to the fact that I have very thin stool. I d love an opinion on this. Thank you.