Well, the incontinence thing was done to me, i didn't choose it. It involved a criminal act while i was locked up. the damage was so severe it triggered what is referred to as rectal entropy. my rectum got so damaged it just gave up. well, as for how it can be done, try to do more anal play that really pushes you to your limit and then you keep going until the limit is gone and it just stops. Do NOT do it immediately in one go or push too hard because this is, and i can't stress this enough; EXTREMELY RISKY. you can do severe damage. so I recommend talking with any anal stretchers you know and ask them for advice.