The longer the penis, the larger the fraction of women who will find sex with that person painful, and at some point the reproductive advantage of scooping out others’ semen will be nullified due to the fact that no woman wants to sleep with you. I think I read that four inches is the length that most women find comfortable, but I don’t remember where I read it.
The hell is wrong with these people. That’s one of the more disgusting objectifications of women I’ve read from current times, and it’s littered with ridiculous inaccuracies from beginning to end. Just to point out one, we’re much more related to chimpanzees and bonobos than gorillas, so if you’re going to assume that genetic similarity determines behavior (which is already an unfounded assumption), you should at least refer to them.