Not important to me at all. I'm small (5x4.5) and all my gfs have had much bigger guys than me. My present gf (of three years) is such a sexy hotty she could have any guy she chooses - there's always a ton of guys after her - but she chooses me. And we have a great time together, including fantastic sex. I'm not saying that size is not important, but it's only one factor and there are many much more important ones. I guess if I had a monster cock she wouldn't complain. But she's not complaining about my five incher either.