Who are bagmama06 and umbilicordz and why do they always ask about inserting old umbilical cords??

I don't have any children and have never been pregnant but I like to search this board from time to time to see what's going on. I always see that bagmama06 and umbilicordz on here asking questions about storing umbilical cords and inserting them into your uterus. How exactly can this possibly be done? DO they do this at home? I mean wouldn't that hurt and be nasty and disgusting to stick anything up your crotch?? What are they talking about?