To revolt is a natural tendency of life. Even a worm turns against the foot that crushes it. In general, the vitality and relative dignity of an animal can be measured by the intensity of its instinct to revolt.
Every once in a while I get the highly inappropriate proposal which is like, 'Wow, Really! You don't even know me and I don't know you at all, and you want that to happen? Tonight? Ok, I get off work at 7.30.'