Well, Karen, there is always the analogy of tears - even if we cry a lot, we can always cry more. And the most obvious one - our kidneys are always producing urine, so that even if we empty our bladders, there is still always more there... And we do talk about emptying our bladders, but I don't think we truly do any more than we empty our breasts. But, I don't talk about that as the analogy with moms. As long as we are clear on what "we" mean by emptying the breast, I don't think we have to worry. I'm a bit reluctant to use softening of the breast, because it implies there has to be fullness/firmness before we can bf, otherwise the br is "empty" and the baby won't get anything. If a mom is routinely bf every 2 hours or so, she may not notice fullness unless she suddenly goes 2 1/2 or 3 hours. The sink is a good one - and I think it is good for description in talking to moms & professionals. Karen, if you don't mind, I might just borrow it. But, it would be nice to have a good short term that was correct! At least we won't be saying as the advertisement for a particular bottle feeding system, "...and the bag collapses like a breast...." isn't that the greatest mental picture of what is happening? When was the last time you saw a breast collapse after the baby nursed? Hugs, Jan