"Preliminary work has revealed that only about 7% of women always have orgasms with {*}sex alone, he says, while 27% say they never do." ({*} 'sex alone' as in 'penetration alone'). Source:
http://www.latimes.com/features/health/la-hew-ordistance11feb11,0,2763149.story#ixzz2pXArH58JWhat matters for those mere 7% of women is actually girth, not length. The more girth the better the clitoris is stimulated because that is just the way it is. Length gives nothing extra aside from affording more positions in kinky Kama Sutra and which hardly anyone really cares to take the time to learn let alone use anyway. Also, the clitoris is the sole reason a woman can orgasm in the first place and for the very same reason why a man without a glans wouldn't be able too either. That's where the necessary nerves are. Without them and their ability to be directly stimulated, forget about it. So that means the overwhelming majority of guys just can't get the job done with only their "perfectly normal" knob. Imagine that.
Let's really simplify that. A man with >5" girth but let's say 3" length will have a much better chance of pleasuring his female partner than would a man at <4" girth and 9" length. Amazing.
Anyway. It's also interesting to note that the... other cavity... has many more nerves than the vaginal one. Surprised? So was I, but its true. Go look it up because when you do, you'll find out that even the majority of women that can't orgasm from PIV, a lot more can from PIA (yes, despite the lack of a prostate)... how does that work? They're still figuring that out, I couldn't tell ya. It just does.
At the end of the day, a woman's pleasure is dependent upon the type and quality of foreplay. Women's favorite foreplay is pretty much the same as a man's... think in the neighborhood of where you're thinking from and you'll get it. Master THAT organ and you'll be able to pleasure any woman you want to the point of that woman simply not giving a flying ->-bleeped-<- about anything else 'in the bedroom', or so I've heard from 100% of the "perfectly normal" guys I hang with.
Yup, that's right... horny shmucks of all types have to pay their dues in foreplay before getting their grand prize in return. And the world keeps on a turnin'.
Sorry all, that last was my admittedly sub-par attempt at humor. No offense intended.