Shitty soup

You don't allow for neutrality

I do, with plenty of things--for instance, it would be morally neutral if I got up for five seconds and sat down again. I did mention that there are imperatives against the lymph example, so it's not neutral.

Moral imperative- it is shameful to waste that which could be used for the betterment of others

Now you'd have to demonstrate in which way exactly lymph liquid would contribute to 'the betterment of others'.

In this case the contents of Clive's Lymph filled buttock could be digested by yourself, which would arguably be better than it being incinerated at Clive's local Bupa.
Yes, but why?

(I'm assuming you're being serious more on heuristic grounds than anything else. ;) )