>>82030828While size is a turn on, men care a lot more about shape (as long as your at least a B unles they have a perflat fetish). Men are also a much more understanding about size, and how there's nothing you can do about it. While having a girlfriend with both big and beautiful boobs can be a huge turn on, if she's mentally or physically hurt by her size it'll bring a lot more negative to the relationship than positive.
Shape is a different issue, men can get hung up on disproportionate or unpleasing shape.
It would be awesome if they invent something that can make a girl a J-cup for a night or a guy have a 10 inch dong for a night. Both of those things are something you'd like to have in your bed at least once, but not something you'd like to deal with daily.