Why Sesshomaru has that Purple Moon on his Face
If I owned inuyasha, I would hate earthquakes.
Once upon a time in the land of Inu-daddy's basement, the two brothers Inuyasha and Sesshomaru were inhaling sharpies. Suddenly, while Sesshomaru was sniffing a grape flavored sharpie (which are rather strong), he fainted, and left the sharpies in Inuyasha's hands.
Inuyasha, being an annoying younger brother, uncapped the magenta sharpie and drew all over Sesshomaru's face. Then, slowly and carefully, he unclasped Sesshomaru's hand and took out the grape sharpie, and drew the purple moon.
Sesshomaru awoke with a mirror in front of his face.
"AAAAAAAAAAAAAAAAAH! MY BEAUTIFUL COMPLEXTION!"
He tried in vain to wash the marker from his face, but, as we know, sharpies are permanent. He was so upset that he vowed to kill Inuyasha (that half-demon thing was just a convenient excuse).
And that, my friends, is how Sesshomaru got his magenta eyeshadow and purple moon.