Wow. I don't know how a best selling book about relations could possible say anything positive about that topic...or could even incorporate it either?
How would it go in the books context?
Maybe something like this....
"when trying to relate to someone with coprophagia, try and avoid the following phrase when at dinner with the person "this food tastes like $hit!", becasue it may make them feel uncomfortable because of their craving for the $hit."
Oh yes.....a best seller for sure.
I don't think that will be on Step 1.