I was into it, and was able to for a long time a few years ago, and was able to fist myself. Surprisingly this was before I got the Orca from EE, but once I got it, it just helped me out in size.
I was only ever fisted once by someone else, but it wasnt a good experience for me. I wasnt ready, or comfortable, and he moved too quickly for me.
Anyways,
Nowadays, I am out of practice, and dont use toys that often. I can still take a very large knot on a BD toy, but itll take some time to get back to be able to take a fist (or an equine cock).
Ill get back into it sooner or later, I just need some motivation for my lazy ass I guess, lol