And your boobs take almost the same amount of abuse as your feet do with all that running. Running 26.2 miles is not easy on your body. Either way, it’s hard not to want to hug them for all the tireless service they provided. Some people end up keeping their larger pregnancy breasts, but others end up smaller than they started. That is if balloons had random chunks of sand in them. Once the milk is gone, your glorious, functional nursing boobs become sad, deflated balloons. Not only are they filled - bursting - with liquid, but said liquid also randomly squirts out at the most inopportune times. But if you thought pregnancy boobs were a change, then nursing is like having your breasts possessed by aliens. Their ability to sustain a whole human life never ceases to amaze me. Nursing breasts are a force to be reckoned with.