What are the ways of expressing the lack of ability to refrain from doing something? The only one I've found is help + ...ing. For example:
She can't help singing along when she hears this tune.
Obviously She can't not sing is incorrect, and She is not able not to sing sounds clumsy.
Q1: Are there other ways to express the same idea?
Q2: Does the following sentence sound natural? If not, how would you rephrase it?
John can't help spoiling whatever he lays his hands on. (= It's an inherent quality of John to spoil everything (possibly involuntarily) that he touches)
P.S. Couldn't figure out how to tag this question properly. Feel free to retag and remove this line.