This is a question mostly for the ladies, but I'm sure a few guys can jump in if they have a good answer. Let me try to give some details before I ask my question... My g/f is used to me waiting for her to cum first, but the occassions where I have cum before her I usually just let her ride me or I keep thrusting etc until she cums. A few weeks back my g/f was on top of me and about to orgasm, but it was one of the few times I just couldn't control myself and I cummed. But I was way too sensitive this time to let her keep riding me so I physically lifted her off me and put her down on the other side of the bed... She looked over at me and said "Omigod I wasn't finished, I was just about to cum when you did!" or something to that effect. Then it happened... She started to thrash around on the bed, then jumped back on me and demanded I rub her clit NOW! She turned crazy as hell and so I rubbed her clit for fear of my own life - and she cummed in maybe 2-3 mins and she fell off me and rolled around the bed grabbing the sheets and even left claw marks on my chest, etc. I've seen her have major Os before but this one was insane.... It has to be because she got almost to the point of having an orgasm, then I came and she couldn't finish. I want to try and experiement with my g/f and orally/with my fingers bring her close to an orgasm, then stop... but it is hard to tell exactly when I should stop. I know many women have told me not to stop when they are getting close to orgasm... so this is a tricky thing I want to try with her. The thing is I can't really ask her or she will think about it while I'm doing it. I will have to really pay attention to her breathing and body language, then decide on the spur of the moment when to stop and go gently kiss her inner thighs or kiss her mouth, tummy etc and back her off for a few mins - then go back down on her.. and repeat the process several times before I finish her off. Is there anything I should do differently than what I described or other little tips I should do?