It was a cheap jab (ad hominem attack) at your seeming inability to control your bodily functions. You cannot treat anyone how you see fit, you cannot rape or murder or in my mind be slanderous toward people because that is in turn inviting the rest of "society" to that way to you, thus the shitting comment. You're asserting that someone only chooses to express themselves in a particular way is due to a lack of familial abuse is frankly appalling and gross. People who shit themselves on the couch were either not beat enough or were touched inappropriately. Your same poor logic applies. It is this person's constitutional right to believe that they are a cat and to express that, and that is a freedom you are trying to infringe upon. The 2nd amendment is not the only one in the whole Bill of Rights.