Do guys really only want huge tits?
Nope. I think size is fairly trivial.
But a lot of women -- especially younger women -- seem to think that "guys really only want huge tits."
That's because young women are usually around young men, and young men are fucking idiots. They notice the boobs first and want to play with them because they don't have their own. Because the women with the bad backs are getting the attention from these guys, they think every guy wants them huge.
It took me a few years and dating women of bra sizes AA to WTF to develop an appreciation for all of them. Each woman has her right size. One thing I found out from my experience was that women typically have the same number of nerves in their boobs and nipples regardless of size, so the tiny ones are more sensitive. I thought they were more fun to play with, especially since the guys they were with would almost ignore them completely. A couple flicks here and there and she's ready to go. With the bigger boobs, it was a different kind of fun.
My favorite ones are the ones attached to my wife, and she's on the average to slightly below average size. The only time I'd say they were big was when she was pregnant and/or breastfeeding, and she really didn't want me playing with them. Not that I didn't try.