One thing that ruins your knockers is expressing for about an hour at a time half a dozen times a day. Mine are covered in stretch marks now around the nipple. I know you're not supposed to do it for more than 10 mins, but 10 mins gives like 5mls and 45 mins gives 60-150mls, so if I'm going to do it I might as well do it. My knockers are also huge at the moment, I will be happier, I think, when I stop this nonsense and let them shrink again, but fear for the state of them, they used to look like Keely Hazell's, honestly, even at 34, and I think all this nursing bra business and general hugeness has seen standards fall considerably.