How did penis size insecurity become prevalent?

Genuinely curious, why are so many men so obsessed with their dick size? In addition how did this insecurity even come about?

As someone who has dated multiple women I have literally never once been asked for a dick pic. Ever in my entire life. I don’t know if it’s just a weird obsession that men who are still in the closet have, but there have been multiple posts and comments on this sub about dick size that are completely unsubstantiated.

I feel like men are projecting their own reasoning and shallowness onto women. I’m not sure what kind of dates these guys go on, but I have a hard time believing that a woman who find you attractive, laugh at your jokes, and genuinely likes you, would nope out of sex because of penis size once the clothes are already off.

Also, just because a man might have a smaller penis does not mean that the sex won’t be good or enjoyable. Sure, I could see how a bigger dick could make sex marginally better, but any woman willing to throw away a healthy and happy relationship because of something like that probably isn’t the norm and definitely would not be worth dating to begin with.

I am actually afraid that the sub is getting bombarded by virgins who have never actually had sex or been in a relationship before.