If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
I would say that for practical purposes, we could distinguish "selfish" desires from simple "desires," as being ones which place an inappropriate degree of burden on other people. After all, in general usage, we tend to use selfish to mean "privileging oneself over others to an inappropriate degree," not "concerned with oneself at all."
In that context, "I need you to definitely stay dead forever so I can stop worrying about it," seems like a good example of a selfish desire, and rather more like something one would apply to a comic book archenemy than a loved one.
in general usage, we tend to use selfish to mean "privileging oneself over others to an inappropriate degree,"
This definition turns on the word "inappropriate" which is a weasel word and can mean everything (and nothing) under the sun. How can one be so selfish as to order a Starbucks latte when there are hungry children in Mozambique?
"I need you to definitely stay dead forever so I can stop worrying about it,"
Doesn't look nice, but then most things dialed to 11 don't look nice.
Let's look at analogous realistic example...