I apologize for being graphic, but I’m about average length, and on the low end of the average girth. My wife and I had been married for 19 years, and she had always been very easily orgasmic. Clitoral, PIV and vaginal orgasms. There were times that I could make her orgasm by just giving her a sensual massage. When we were dating, I was the first man to ever make her orgasm. She had never even given herself an orgasm before that.
Well, due to problems in our marriage she ended up having the affair with a man with a much larger dick. He was almost 50% thicker, and about 50% longer as I got to know later.
They had sex sometimes 3 times a day for long periods of time. Basically they had sex 10 times in 8 days, and the only reason they missed a few days was because of work commitments.
I suspected an affair, but was in denial at the time. My wife ended up with a very bad UTI from this guy, and we didn’t have sex for two weeks after she last had sex with him. When we did, I couldn’t feel a thing. She was so stretched out it was like the proverbial “tossing a hot-dog down a hallway”. She didn’t have an orgasm with me for almost two months, except for oral.
Prior to the affair I had a hard time getting two fingers in her, afterwards - 4 fingers and I think I could have put my whole fist up there.
Her vagina did eventually go back to “almost” her prior tightness, but it was never as tight as before him. Not a big difference, but it’s noticeable. For her as well.
We’ve spoken of the affair recently and she said she really couldn’t feel me for at least a month after him and that she missed the sensation.
So, do large penis’s stretch out a woman's vagina? Absolutely. Permanently, not likely, unless she keeps having sex with the larger man or uses large dildos. Most folks, doctors, say it goes back right away. I can tell you in my wife’s case it did not. It took a while.