Hmm, first statement is a little bit off the mark. I don't think there's a woman alive who wants her boyfriend to be a cunt to her. There's nothing wrong with decency and being a gentleman.
Now, main point at hand. Remember the saying: "Its not the size, its the motion in the ocean." At one point small penises were actually considered more desirable and symbolic of status in Ancient Rome and Greece - why else do so many of their statues have them.
At the end of the day, don't worry about something you can't change.