I decided a while ago I was not gonna "eat frogs first". I'd turn all frogs into princes instead.
Look here:
https://www.youtube.com/watch?v=1TSTnDRnIAs
Not sure I like the promo with the vid and a couple of other things, but the facts seem right. How doing the horrible for a reward can make it harder to do THE THING.
As an animal psychologist, we talk about "frustration". Looking for a reward... it isn't there (yet)! Feeling non-reward during the actual work is in effect a punishment.