Lol that reminds me, my AP physics teacher remarked something like "I know it sounds cruel, but have pregnant women carry a backpack. It moves their center of gravity back to the middle of them and they can walk upright again. It's what I did for my two kids"

Slightly related, she was a really good physics teacher.

Carrying boobs around on your chest causes back pain in the same way that carrying a heavy box around at chest height all day, every day would. Take them off and now your back gets some rest.

Boobies are heavy and can cause back pain.