I guess I'm in the same boat as others here. I can have an orgasm from oral sex alone, though it usually takes some time. There are probably ways to cut down the time though. What works best for us, when it comes to both time and pleasure, is a mix of masturbation (with her at the ready, so to speak) and oral sex. Some guys are better in certain positions as well. I have issues with getting orally pleased while I am laying flat on my back, for example, so you'd never get me to orgasm in that position using only oral.