Spexy's got it right. Getting women off means getting women to a good place mentally with you. Women pretty much go by four levels of thought:
1: I could fuck him: All women know this immediately upon being around you. No guesswork involved knowing where you stand at this level
2: I would fuck him: This level always includes a '...but'. It's up to us men to figure out what that but is, and remove the apprehension.
3: I will fuck him: Good enough for most men, but not the level you wanna get to. Also know as 'The Test Drive', this level doesn't mean a sequel will happen. In fact, this is the most dangerous level long term, because if you're not up to snuff, it only reminds her of the original apprehensions and word will spread. Quickly.
4: I want him to fuck me: This is the place you wanna be. Get here, and she gets off. Once she gets to this level, the time she isn't fucking you only adds intrigue and build up, which means she's gotten off before getting off.