Everybody has a price. They may act as though they don't. They'll pitch fits, refuse to cooperate or negotiate or discuss the immovable moral belief system that beats deep in the center of their hearts and souls. Their line in the sand is welded steel in marble encased in unobtainium.
Until you give them a belly rub for 20 minutes, and then not only can you trim a piggle's toenails, but you could paint them raving red.
Raving Red would match his eyes if I did that last bit.