Jeff has decided to grow a moustache for "Movember." Movember is a fundraiser to raise money for male health issues. Men register, and grow a moustache for the entire month of November. On November 27th one of his friends says "Jeff, you've got the ugliest moustache in the world, you've got to have it off!" "Are you kidding?" said Jeff, "I've invested 27 days in this thing, and I've got to keep it until the end of the month." Is Jeff's reasoning consistent with economic principles?