[Captain0blivious]

Well then, if you think you can make yourself do it, I dare you to put on diaper and a t-shirt (no pants allowed) at home. You must wet yourself. You are not allowed to change your diaper until you've completely messed yourself (get everything out) and spent 15 minutes in it. You can shower and what not to get clean, but you can only change into another diaper (after all, you would just have helplessly messed yourself, you need this protection...).

If you can't make yourself mess, you must buy an enema (cheap from a pharmacy or walgreens/walmart for ~$3), use it, and do the same dare.

Finally, you must post a report of the full experience here in a comment.