I usually need intense clit stim, usually a wand vibrator AFTER some good oral sex, along with A Spot stimulation, in order to come. It can take me anywhere from 5 to 50 minutes. When I was younger, I could come from very little clit stim and used to stop myself, and make him do something else, because if I came too soon, I used to lose interest. I can have multiples now, so I don't lose interest, but it is not as easy as it used to be, but they are longer and better.
I can have G Spot orgasms, but if they aren't blended with clit orgasms, I am left frustrated. They just don't relieve the build up, for whatever reason, although to My Man they look, feel and sound just like a "regular" orgasm.
After the first "hard" orgasm I can come during PIV, or anal or even while giving him head. After the first one, it isn't difficult. NOBODY told me this would happen. It used to be so easy, but I'd lose interest afterward, now it's difficult, but I can go all night after the first one.