Jim,

Its funny how we all tend to look at things differently because my reaction to your list isn't that it got progressively more disgusting as I would rank it Spit, piss, socks and then bath water as the progression of disgusting things.

As for me... Consuming nasty things is very much on my limits list. Which is not to say I haven't been forced to do so (I just don't talk about it because I know/see too many Dommes and they tend to want to one-up each other).