A guy needing to be told he's big, isn't big IMHO.
A big guy would know it - only guys with smaller dicks need to be told (lied to)...
that's what you'd think, but not true... there are plenty of guys who are bigger than almost every other guy who are still worried about it. I mean, there is always someone bigger than them, and when you've hitched your entire idea of your sexual worth to the size of your penis, i guess it can be hard to deal with that.
and there are plenty of small dicked guys who are there to get some pussy and have fun and aren't there worrying about the size of other men's genitalia, and that's great.
i mean, it's not too weird... there are plenty of gorgeous women who constantly worry they're not gorgeous enough.