As much as many women say that penis size doesn't matter i bet that the same woman wouldn't say that to a man that's got a bigger penis. Some may say performance is more important and it probably is but the same man doing the same stuff with an extra 2 inches of penis will touch places that he's never been before. More importantly, if he has a thicker penis he can stretch the sides of her vagina more and it will be more sensitive.

I would be willing to bet any man that unless he is already unusually large that his wife or girlfriend would be happier if he gained another inch or 2. Even if she says she is totally happy, and she may be telling the truth, she will soon start moaning a lot more and having more orgasms once you've gained an inch or more.

The only time a woman says that smaller is better is if she has had some experience with both and the guy with a small penis has been a better lover or cared more about her experience than his own. That has nothing to do with penis size, wait till you've gained some length and see what she says about size not mattering then.