What the _uck is that?

Okay so maybe I feel a bit obligated to provide some sort of explanation so that people don't dismiss me as a complete whack job (or maybe in attempt to justify my derangement idiosyncrasies to myself). It is all too apparent that I am ceaselessly amused by most derivatives of names for excretory matter. Like poop, poo poo, poopie, dookie, doodie, and of course my all time favorite DOO DOOOOOOOOO!!! (which must be spoken with the proper intonation, mind you) No it's not normal. I realize this, but let me explain my theory of why this may be. During my childhood, I never used these words, because I was taught to say BM.
I need to BM.
Where is the BM?
Did you BM today? Yes, this morning.
Ummm, yeah...kind of lacking in excitement there.
At some point there came a realization that other kids were not using this expression. And along with it came the discovery of this vast collection of alternative words.
Why does saying these words, or better yet hearing someone else use them, tickle me so? Why does my brother insist on nicknaming me with the word poop, from just plain poop, to poop diddy, to the specially reserved P – double O – P diddy?
Believe me when I tell you, it's not our fault, we just can't help it! (Well, admittedly the whole P. Diddy obsession is some kind of personal problem of his.) Blame the parents.