I have never been with a woman who really desired vaginal penetration to go on without a break for more than about 15-20 min, 30 min absolute tops.
There is a lot of stuff on the web that would suggest that a large majority of women never orgasm with vaginal intercourse in the absence of direct clitoral stimulation. That just doesn't fit with my experience. I am not saying that a significant percentage never do and only a relatively small percentage orgasm just about every time. But I have had a number of partners who did come sometimes, but not regularly.
For what it is worth, my experience closely matches this input from Dr. Drew:
"
Dr. Drew: Yes, men and women are wired differently, moreover women are wired differently from each other. Many times women will feel as though they are flawed because they are not living up to a certain standard of climaxing. Men make it worse because they generalize what’s needed to make a woman climax. Often men believe women are the same, and once they figure what works for one woman they apply that same method to all the other women they are intimate with, and that’s one of the major problems.
- 50-60% of women will never have an orgasm via intercourse and will require clitoral stimulation to climax.
- 30% of women will have a reliable orgasm with intercourse.
- 10% of women will orgasm with intercourse and could possibly have sequential orgasms.
- 5% of women have true multiple orgasms only through intercourse and these women typically find oral sex uncomfortable."
I also found this survey on female sexuality interesting and pretty accurate in so far as frequency of female orgasm with vaginal intercourse was concerned:
Women's sex experiences
The survey includes information on what techniques women used to reach orgasm as well as the frequency with which they climaxed with vaginal sex without direct clitoral stimulation (which is in entry 12). If you don't want to open the link, here are the responses to the following question:
"How often do you reach orgasm as a result of vaginal intercourse alone? (Just to be clear, if you use your hand or anything else to help you get to orgasm during intercourse, please answer "never" to this question.)"
never 31.9%
up to 10% of the time 10.9%
between 10 and 25% of the time 5.9%
between 25 and 50% of the time 8.4%
between 50 and 75% of the time 16.0%
over 75% of the time 8.4%
I expect to come every time 18.5%