Mr. Happy is always spot on.
I will add however, that there may be a difference between a “girlfriend” and a long term partner or wife. It has taken my wife time to adjust to my gains, but according to her it has been well worth the effort. We are talking about months, maybe even years to adjust.
Now I am not saying to “just get used to it baby”. Nor am I saying that every woman will adjust as well as my wife. (Evidenced by those two wives who invented that spacer thing in the article.)
If a man and a woman want to be together in the long term, they should not split because his penis is too big any more than if it is too small. A way will be found, whether it comes down to technique, lubricant, simply not sticking all the way in, having the woman adjust over time, or getting some of those “spacers”.
Having said that, a single man with a big penis having casual sex is going to have problems with some women. It is going to be too big for some, just right for others. But a single man with an average dick is going to have the same problems.
If I were single, I would still do PE all the way as big as I could get, but I would understand the limitations this may mean for casual sex, and adjust my technique accordingly. When the right woman comes along she would love me for the entire man, my penis size being a small part of the entire package, no matter what size it was.
As a married man the situation changes a lot, because she has already made her “purchase”. PE has been really good for me and my wife, but I can easily see how it may not for others. My advice would be to stop when she says stop. Then see if she adjusts completely to that size and revisit the topic. Newbie gains can be difficult for her as they can happen fast.
I will also say that in my most personal experience, and from reading posts, that there seems to be some sort of threshold at around 7-7.5 inches. Under that or over that, and there are few problems, but right in that zone seems to be where most of the complaints occur.