Yeah, it's a stupid docu. It makes it look like if your penis is over 8 inches, your women will be in pain and you'll be so penis obsessed that you'll have to start having sex with whomever can fit it in their ass - guys mostly.
Most of the guys with big dicks on LPSG are between 7" and 9". Manageable for most females of the species. Plenty of big guys on here who maybe didn't even know they were big until they found LPSG. I used to think mine was completely normal, and I still do think it is completely consistent with my body size, but now I know it is bigger or at least thicker than some guys who are built like me.
From my point of view, maybe skewed because most of my sexual experiences have been masturbatory, but it's the visual element and knowing that you've got that in your pocket to play with whenever you want.
I'm sure a Jonah Falcon size dick would be life altering, but the majority of big dicked guys are (not nearly that large) well adjusted and see it as a plus. Jonah even says he likes it and wouldn't change anything.