On this week's "CBS Sunday Morning" with Jane Pauley: Susan Spencer asks some experts about the truth of true love. Jim Axelrod sits down with comedian Chevy Chase. Ted Koppel looks at life lessons from losing a football game. Luke Burbank finds out why some Montana weddings don't have either a bride or groom present; Rita Braver checks out how zoos and aquariums play matchmaker for their animals, and Conor Knighton examines a billion-dollar-a-year industry – commercials for lawyers.

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