Surprisingly, there indeed seems to be no hard-wired understanding of periods. Freaking out on your first one is common for unwarned young women. Dealing with t

Surprisingly, there indeed seems to be no hard-wired understanding of periods. Freaking out on your first one is common for unwarned young women. Dealing with this has been off-loaded to culture. And the various idiocies in traditional cultures about how to deal with menstruating women show that freaking out about this has been pretty common through history.