I've gone through massive reversals in my metaethics twice now, and guess what? At no time did I spontaneously acquire the urge to rape people. At no time did I stop caring about the impoverished. At no time did I want to steal from the elderly. At no time did people stop having reasons to praise or condemn certain desires and actions of mine, and at no time did I stop having reasons to praise or condemn the desires and actions of others.

Metaethics: what's it good for...