Most women cannot orgasm from intercourse (around 80%). Because most dicks are too small, lol. A big dick can really hit that spot, put good pressure on it. I've been with women who can't orgasm from intercourse alone on my 8 inches, but can with a huge dildo.

Women like it dirty, man. And yeah ,it does depend on the woman, but the intercourse orgasm numbers are very interesting:

http://www.womansday.com/relationships/ ... ms-111985/

So is it surprising that a girl can give herself an orgasm with a dildo and a guy can't do it with his dick?

No...especially if the guy doesn't know how to stimulate and hit the gspot.

Hell, if you let a girl ride you and you have the stamina...she'll have an orgasm with you doing absolutely no work no matter how big your dick is (well...at least the required length to hit her spot).

Self-pleasure has nothing to do with it, really. Anyone can be doing it.

If your dick isn't big enough, it's not going to put enough pressure on the spot. Again, look at the science. Most women cannot orgasm from intercourse alone, even if the guy is able to hit her g-spot.

It's not the pressure that does it...it's the stimulation.

Pressure is part of stimulation. Which is why 80% of women can't have orgasms from intercourse.

I have seen women orgasm just from a big dildo inside them, barely moving at all. And they were powerful orgasms.

Every woman I've met can orgasm from fingers stimulating the g-spot and by licking the clitoris. But we are talking about intercourse, and no other stimulation.

If you can put a girl in doggy style for 15-20 minutes and give her consistent rhythmic thrusts, you won't hear anything about most women can't have an orgasm by penetration alone.

About 75 percent of all women never reach orgasm from intercourse alone -- that is without the extra help of sex toys, hands or tongue.

Science is a great thing:

http://abcnews.go.com/Health/Reproducti ... id=8485289

These numbers sound about right to me. I've had gf's who can orgasm just from intercourse, but most cannot. It does not matter how long you go, etc, or how well you aim. Some women just need that big pressure inside of them to go off without clit stimulation.

And if you're banging a girl doggystyle for 20 minutes, you're boring her, lol.

It's crazy to say that these numbers line up with what you've experienced and that most girls that you've been with can't have an orgasm by penetration alone even though you have that bigger dick to supply the pressure that they need.

Or how you said earlier in the thread that they are relieved that your dick is bigger than what they've had in the past.

Are you being deliberately obtuse?

Numerous studies indicate that 75-80% of women cannot orgasm from intercourse alone. There are theories behind this, like the distance from clitoris to vagina opening on women (the closer, the easier for them to orgasm).

I've banged girls who orgasm in 30 seconds from regular intercourse, girls who orgasm from a vibrator on their clit and my dick inside them, my fingers inside them and my tongue on their clit, and from big dildos barely moving inside them with no outside stimulation. Making women orgasm is easy. However, if you understand science, studies verify that most women cannot orgasm from intercourse alone. I have found that some of these women CAN orgasm just from intercourse if using big dildos. Yeah man, sometimes 8 inches isn't enough. No big deal.

Yes, they all say this. But my dick is no guarantee to make a girl who can't cum from intercourse alone, cum. Because science will tell you, most girls don't cum that way. That's why it's good to know how to use your tongue and fingers, and good to have an open mind to bring toys into the bedroom.

The study says 75% of women can't orgasm from intercourse alone. Pretty clear. Numerous studies say this, and yes, interviews are part of peer reviewed scientific journals.

I often see statistics that indicate 50% of women can't orgasm or 75% can't orgasm from penetration alone. Can you point me to the sources of said statistics and could you explain what exactly "penetration alone" means?

Thanks for your question. Unfortunately, I cannot point you to a scientific source for these statistics because I am not sure where they came from and I don't think they are completely accurate. That said, let’s first address your question about whether there are some women who just can’t seem to reach orgasm at all. Although the exact numbers vary quite a bit across studies, there are indeed some women who report never having climaxed in their entire lives. For example, this number was 10% in Alfred Kinsey’s pioneering research on human sexuality in the 1940s and 50s [1], and 3% in a recent national survey in Sweden [2]. Most other studies I have seen have yielded numbers in between. Thus, the statistic you heard about half of women being anorgasmic (i.e., lacking the ability to orgasm) simply has no basis in reality.

As for your other question about whether a majority of heterosexual women cannot reach orgasm through “penetration alone,” there is probably a bit more truth to that one. Let me first clarify that when we’re talking about “penetration alone,” we are referring to a woman’s ability to climax solely on the basis of penile movements inside the vagina during intercourse without providing any type of direct clitoral stimulation with a hand, vibrator, etc.

Now, as for that 75% statistic, I have seen it on a lot of news and advice websites (see here for an example from ABC News). However, all of these websites cite it as a statement of fact and do not back it up with a scientific source. So, let’s see what the research says. For instance, if we consider the Hite Report from the 1970s (a North American study that sampled approximately 2,000 women) results indicated that among those women who reported having had at least one orgasm before and who indicated being sexually active, 30% reported regularly reaching orgasm during intercourse, 12% rarely reached orgasm, 19% only reached orgasm if their clitoris was simultaneously stimulated, and 29% reported never orgasming during intercourse under any circumstances [3]. In the aforementioned Swedish study, the questions were asked somewhat differently, but researchers found that 55% of the women reported having reached orgasm during intercourse solely from penile movements at least once before [2].

Thus, when you average across these two studies and the others that I have seen, it looks like around half of heterosexual women are at least sometimes orgasmic as a result of penetration alone, whereas the other half either require added clitoral stimulation or other sexual activities in order to climax. So, based on the evidence I’ve seen, the 75% figure that’s frequently thrown around is probably a bit too high.

Here is a quote from an actual expert in the field and not a staff writer from a magazine when someone asked the question about the statistics that you are hanging your hat on.

This bears repeating: Only one-quarter of women reliably experience orgasm during intercourse-no matter how long it lasts, no matter what size the man's penis, and no matter how the woman feels about the man or the relationship.

This statistic comes not from just one study, but from a comprehensive analysis of 33 studies over the past 80 years by Elisabeth Lloyd in her fascinating book The Case of the Female Orgasm (Harvard University Press).

I agree with Jack here. Hitting the Gspot really isn't rocket science and if it comes down to it, the bend is more important than size because it allows for more flexible angles.

Supporting the hypothesis that size matters, Brody and his colleagues found the women who reported the highest number of vaginal orgasms in the past month were most likely to say that longer was better.

"This might be due at least in part to greater ability of a longer penis to stimulate the entire length of the vagina, and the cervix," Brody said.