The Riddle of the Sphincter

In mythology, the Sphincter sat in Brussels and asked this riddle of all who passed by. If the they failed to solve the riddle, then the Sphincter killed him/her. And if the passerby answered the riddle correctly, then the Sphincter would destroy itself.
The riddle:

"What is worth five times more in the morning, three in the afternoon and two at night?".

Oedipus Papandreou solved the riddle.