I agree that dick size can be compared with breast size. The main difference is though, that dick size isn't advertised in public everyday like breasts. I think this might cause more anxiety because it's a surprise when 2 people get to the unzipping stage.
I can't say I'm had a lot of experience...ok, not much at all. But in my experience length isn't as important as girth. I traumatized an ex by nicknaming him Pencil Dick...note the ex part.
I don't know why he didn't want to stay with me.
You are given what you are given. Do I like having small breasts...meh, it's alright, but I'd like more. Although, I found someone with no complaints about that. Do guys want a small dick? Probably not, but the right person won't care and there are many ways to please a partner.