Pumping myths.

What are some myths you've heard/read about pumping? I feel like there's a lot of well-intentioned but ultimately false information that gets shared around about pumping, both in EP spaces and outside it. Maybe it's time to have a place to document it all.

I'll go first:

Taking lecithin to increase supply. I assume this is some mix-up born of people taking lecithin tablets to help prevent clogs, and the wires got crossed on the details somewhere. Drives me a little batty tho.