That depends on a lot of things. basically, i don't look at the clock while I have a man in my bed, but I'd say that I can stretch the span of fucking to climax pretty good. It sounds like a cheap paperback life advisory book, but for me it's all about letting yourself go and be pushed over the edge, a mental thing, a mood thing. If I hold on (mentally), I can keep myself under control for a good time. How long that time span is, depends on many things... if I'm with a guy of substantial size, I'll usually cum from the pure mechanical effects - friction, stimulation, etc, but if he also knows how to use it well, how to arouse me, and is a good-looking stud ;-) - well, I'll not be able to hold on for very long!
Girls, any more of you experience that, that you completely lose the feeling of time while you have sex? It's like that with me.