@eowyn @masukomi @CosmickTrigger thank you for taking the time to elaborate where I was a little glib.
It's the same on the asexuality spectrum of course; it's a spectrum, not a rigid definition.
Some asexuals masturbate, some have no desire to do so. Some have sexual lives, because even if they don't have physical *desire*, they can get mechanically aroused and might want to please their partner. Some never want to have sex at all.
Some can actually have a sexual drive but only under some particular circumstances (greysexuals, demisexuals, etc.).

It's good to remember in general that those terms are umbrella terms and can cover a number of idiosyncratic situations.