Ok, gotta throw my two cents in here. I have anecdotal evidence to share. It paints a picture, I think. Warning: highly sexual content follows:
First, stats. I'm 7.5" BPenis EnlargementL, with an average EG of 5.4". When I started Penis Enlargement (4 months ago) I was 7.25" BPenis EnlargementL with an average EG of 5.3".
One girl I've dated (I'll call her AAA) could take exactly 8" of a dildo once aroused. She could handle 4 of my fingers once aroused. However, some days, she was so tight her vagina felt like a glove, not just at the entrance, but all the way in. Like, I could feel it clinging to me when I pulled out.
Another girl (BBB) I dated could take exactly 6" of a dildo once aroused, 5" otherwise. Believe me, I tried to fit more in!
She could handle 3 of my fingers comfortably once aroused, 2 otherwise. After a clitoral orgasm, she could barely take 2 fingers. Depending on the day, or if we had sex right after I ate her out, she would range from tight to loose.
Also, when I was fully inserted, for example with her sitting on me, contact with her back wall compressed the head of my penis, and there was a lot of pressure. Pressure that wasn't entirely comfortable for either of us. On some days, I felt her cervix on every stroke, and I would have to angle past it to avoid hurting her. Sometimes though, after we'd been having sex for a while, I couldn't even feel her cervix. Also, on one occasion, right after we'd had sex, she could barely feel it when I had two fingers in, because she was so relaxed. She had to ask if I had one or two fingers in... which surprised me.
I've also had sex with girls so deep I never felt bottom, and girls that were so loose I couldn't come, and one girl (a virgin when we started dating) who was so tight it was almost painful for me.
I also dated a girl who had tried being lesbian for a while, and she had been fisted by her ex. She had multiple vaginal orgasms when we had sex. In other words, the vagina can stretch to handle a wide variety of penises, and still be pleased by a smaller penis... within reason.
Also, regular sex with a bigger partner will loosen a girl up. When I didn't have sex with AAA for a couple of weeks, she would be noticeably tighter. So, is there such a thing as too thick? Maybe, but more on that later.
Clearly, it varies tremendously from girl to girl, and it even varies with the same girl from day to day. However, take this into consideration:
This girl (BBB) who could barely take 6" length of a dildo (5.75" EG) had by far the biggest orgasms ever I've witnessed from using that dildo on herself, although she sometimes said the thickness hurt a little. She also had noticeably bigger orgasms when I used Viagra.
Side note: If you haven't tried it, Viagra is fun even if you don't need it, because it maxes your erection. For me, my max erection adds a half inch of length and maybe 1/3" girth over my average erection. And I don't get max erections every day. Which is why Viagra is fun. You can have max erections whenever you want, even right after you come. Plus, you can have all-day sex marathons... but I digress.
BBB liked the dildo fully inserted, and would use 1"-2" strokes ending in full insertion so that she would feel the contact against her back wall. In other words, length AND width matters for her. However, she pointed out that the reason she comes so hard that way is because she was controlling the strokes. That allowed her to time the strokes to her muscular contractions and build the orgasm... as I'm sure any guy who's masturbated a lot can identify with: The best orgasms are the ones you work yourself up to, am I right?
Still, if I was holding it, and wasn't deep enough, she would say, "Deeper"...
So clearly, thickness matters for vaginal orgasms. However, a LOT (66%) of women don't have them. Also, length matters for girls who like that pressure against the uterus/back wall. But, if they haven't been with a guy who knows how to work that length without hurting her, they might not like it. Or maybe they have a sensitive cervix.
One final set of anecdotes. When I told BBB that there was a stretching device that increases length, she was visibly excited and turned on before eventually catching herself and saying, "But you're perfect for me the way you are!"
... Right.
When I told her it increased girth as well, she was even more excited. Now this might seem odd given that she can barely take 6". Why would she want me to be bigger when I'm already as big as she can handle?
My theory: Simply because it's exciting. Girls like to see a big, thick cock. They like to brag about their man. A big, thick penis is masculine, and at some instinctive level, tells them that their man is an alpha male. It turns them on. They can moan things like "Fill me with your big cock" when you're having sex.
Also, since women stretch to accommodate a thicker partner (as long as they're having sex 3+ times a week) then it's pretty hard to be too thick. Case in point, and my final anecdote:
BBB had an ex-boyfriend who we talked about at length, because a) i'm incredibly curious, and b) it turns me on, and c) she didn't mind. Side note: Can a straight guy be a size queen? I'm not gay, but small dick �naked people movies� doesn't get me off... weird?
Anyway, this ex, who I'll call CCC, was quite simply huge. Rumors flew around about his size among his friend group. How big? Well, I asked her to compare, and she said at least 2" longer than me. So, I had her compare against a 9" dildo I held bone-pressed against my pubes, and she said maybe a little bigger.
I asked her to compare against a 6.25" EG dildo, and she said maybe a little thicker. I don't have anything bigger, so my guess is he was close to 10" BPenis EnlargementL and 6.5" avg EG. That's fucking huge.
When she had first mentioned he was big, I asked "What, was he really long?" and she said "Well, yeah, he was, but mainly he was really thick. It was almost painful sometimes."
Also, when I said, "Wow, more than 9 inches? So he couldn't fit all the way in?", she said, "Well, sometimes he could."
Fascinating, right? "Almost painful"? A full inch more girth than me and it was only almost painful? Also, "sometimes" he couldn't get all the way in? How much was she stretching to accommodate the extra two inches? They weren't dating, they were just fuck buddies. She had sex with him for 9 months before they broke up. So, clearly, she was enjoying it, and kept coming back for more.
Even if I didn't trust her measurements, I know he was at least 9"+, because when we first started dating, she tried to give me a blowjob on her knees by jerking me with both hands and sucking on the head. She eventually gave up and switched to jerking me with only one hand. She didn't know it, but I died a little inside that day. I knew what it meant... When I asked her later, she confirmed that she could keep the whole head in her mouth while jacking him off with both hands, one on top of the other.
And yet, she repeatedly said she'd never had sex as good as with me. The most orgasms she ever had in one vaginal intercourse session before she met me was 3. With me she averaged 5, and had as many as 10.
She clearly preferred my cock, but I often wonder if it's just because I'm better at using it.
Or is it because he was just a little too big?
I say the bottom line is this:
Size matters. But skill matters more. If you're skilled, you can please her with any reasonably-sized penis. But if you're big AND skilled, you can rock her fucking world... if you're big you can go deep without slamming it into her. You can have sex in crazy positions that otherwise wouldn't work.
Which is why I do Penis Enlargement. I want to be 9" BPenis EnlargementL by 6" avg EG, not because my penis isn't big enough, but because a skilled lover can use that extra size to great effect. And the idea of having a huge cock, with a bulge that women can't help but notice, that sounds pretty awesome too. Am I right?
Peace,
Tom