Hey bro,
There are a lot of men & women into this. Are you not on any lifestyle sites like CollarSpace, Fetlife, and so on? I am sure there are many people who would enjoy talking to you about it. I know my Mistress is into it, and will be using me that way once I am with her, and allowing other women to use me the same way & much more.
I have never had shit yet, but I have been pissed on, drank it, and had a lady pee in my mouth. I like the experience myself. The shit bit is more of a desire humiliation wise, and I am pretty sure I am going to regret asking for it once with her. But hey, the rush right?