I'm sorry, but I don't believe you. I've been here long enough that I believe I've read several thousand posts by men who are average or larger expressing insecurities and dissatisfaction that confirm my belief about men and how sensitive they are about that subject. A man may act like he's okay with it, but I bet that most of the guys who come here and make a thread asking for validation about their penis size also acted like it wasn't a big deal in front of their girlfriends.
Measuring doesn't seem to remove any insecurities at all, if you take the men on LPSG as an example, and behaving like I care about those numbers by pulling out a tape measure would probably confirm a man's belief that it matters more than it actually does to me. I think I've always been on the right track by being very careful about that subject when it comes to men and their egos about their penile dimensions.
Besides, how would you pull out the tape measure and measure without the conversation naturally turning to, "So, do you measure everyone?" and "How do I compare then? Since it seems to matter to you..." It just seems like it would open up a whole Pandora's Box full of issues and future problems, if not in our relationship, than for him somewhere down the road. As far as I'm concerned, that would be making myself unhappy. I like a confident man, and part of that means that I shouldn't do things that would eventually undermine his confidence, or give him insecurities that he didn't already have. We're supposed to make each other happier, not more neurotic. I want him to do the same thing for me!
Here are just some of the links that lead me to believe that I'm right:
http://www.lpsg.org/penis-enlargement/
http://www.lpsg.org/175723-if-you-you-change-one.html
http://www.lpsg.org/208877-size.html
I bet a lot of the men who "Show Off" in that forum are also seeking reassurance that it's big enough.