Why is Sheogorath the Mad God when you consider all the wacky bullshit Vivec has "done"? Seriously, just read a summary of his 36 Lessons and you'll be so fucking confused. One of them details how Vivec slept with Molag Bal and somehow had demon children. Vivec then killed the children with a weapon called Muastra...which turns out to be the nickname for his dick.