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God designs people's emotions so you fall in love with people who, in return, wouldn't even use your hollowed-out skull for a spittoon.

Scott Adams (2007). “Stick to Drawing Comics, Monkey Brain!: Cartoonist Explains Cloning, Blouse Monsters, Voting Machines, Romance, Monkey G ods, How to Avoid Being Mistaken for a Rodent, and More”, p.427, Penguin
God designs people's emotions so you fall in love with people who, in return, wouldn't even use your hollowed-out skull for a spittoon.