I hate to lose. And even worse than losing, I hate being stupid.
The seven days of the week are even named after the seven original planets. Sunday Mo(o)nday, and Satur(n)day are the most obvious, while Tuesday through Friday are more than a bit obscure. Tiw was an ancient Germanic god of war, as Mars was to the Romans, so Tuesday is actually Mars's day. Wednesday is Woden's day. Woden was the carrier of the dead--a Germanic grim reaper--fulfilling one of Mercury's less well-known jobs. (Continued in comments)