Most males are slightly colorblind, so women do see colors better than men.
If you have enough people ask somebody if they are feeling alright/sick or tell them that they don't look so good throughout the day, by the end of the day they will be physically ill.(personally tested, turned out to be true, don't worry I apologized afterwards).
Wednesday was named for the Anglo-Saxon god Woden(Anglo-Saxon equivalent of Norse Odin).
Thursday was named for the Anglo-Saxon/Norse god Thor.
Friday was named for the Norse goddess Freia(not sure if the Anglo-Saxons also worshipped her).
Saturday was named for Saturn(I think this one is right. Pretty sure Saturn was the Roman name for the originally Greek Titan Kronos, Father of the Olympic gods.)
Sunday was named for the Sun.
Monday was named for the moon.
Tuesday was...I don't actually know this one...I think it was a Norse/Anglo-Saxon god...Tui or Tooi...Tuoi? Something like that.