Seems to me that a woman should remember that men are different. The same techniques may work on most men, but they will not have such felicitous responses in all men. Ergo, proceed without asking at your own risk. Or maybe your partner’s risk.
So if you are doing me: start slow and gentle. Do one of those piston wanking things on me and I’ll probably break your hand slamming it away from me. My cock is made of warm, tender flesh and is not a steel camshaft, despite popular belief. Other guys, of course, are definitely camshafts—the wankers!