I have been putting things up my ass since puberty. I started with the obvious, my finger was the first thing up there. I remember that it was a stimulating feeling but different from what I experience when masturbating. I began experimenting with enemas and putting other small phallic like items up my ass. Things I remember starting out with were a plastic travel case for a razor. It was a little thicker than my finger but 2-3" longer. Very smooth so it entered very easily. I even used hot dogs. Eventually I began searching for larger things to try and insert. Vegetables and different size bottles were common. One I liked very much and still do is a racquetball. I was able to put 3 up at one time. Never pushed that limit though, maybe next post. Anyway, I eventually stretched my asshole enough to fit my fist in and can still do it today. I think the largest thing (by largest I mean widest) I've fit in there is a standard size pop can. I've tried bigger things but my pelvic bone is only so big. I don't have the funds to purchase the nice big butt plugs you can buy but I would love to try them eventually. I've not only gone for the size but length as well. This has been a little difficult finding things flexible enough but still sturdy enough to go deep and make the turns in the intestine. I have a clear plastic tube that I use and have inserted 24" of it in.
The pictures here are of a standard size paintball ammo pod. I made a video of this as well but can't figure out how to post videos, any help with that would be appreciated. I have another that has bumps throughout the pod, I'll post some pics of that eventually.
I seriously doubt anyone will read this or find it interesting but if you have any questions or would like to see something shoved up my ass let me know and Ill see what I can do.