This is a very sensitive part of the body because it deals with birth trauma. Some know about it because they were told by their parents or girlfriends, others find out from situations like PFS. Like many others here I have a suspicion that we still have bits of Fin or Saw stuck in our bodies, probably mostly in the liver, and that small amount is enough to not only give us lingering side effects that undermine our healing and full recoveries but new symptoms that make surprise appearances years after.