Okay, I know I'm gonna get a 'cool story bro' for this, so if you want, assume this premise isn't real.
So, my idea of what constitutes 'big' as far as boobs go seems to be somewhat skewed. My girlfriend has g's (No pics, yes she's very overweight due to health problems, but I think she's beautiful anyway) which I deffinitly get are on the very large side. But since I've been with her for five years, they're pretty much what I'm used to. And, by comparison, my d's seem pretty, well - to me, averageish. Heck, maybe even 'cute and little' in comparison.
I love boobs of all sizes, but I honestly don't know what the average size is anymore. And it confuses the shit out of me when people consider d's a big deal - like, 'OhmahgawdHUEG' - seriously, what?