This is an Aesop's fable. Fables, parables and folk tales would not have existed for thousands of years unless there was truth in them. This fable is an example of that.
A Lion once fell in love with a woodman's daughter, and asked for her hand in marriage. The woodman was not so much pleased with the offer, and declined the offer of so dangerous an alliance. When the lion threatened, the man cunningly pretended to give in, saying, "I am honored, sir. But what great teeth and claws you have - enough to frighten any girl! If you are to marry my daughter, you must have your teeth drawn and your claws cut. " The love-struck lion complied straightaway, and then called on the father to accept him as a son-in-law. But the woodsman, no longer afraid of the tamed and disarmed bully, seized a stout cudgel and drove him away.
Moral: Misfortune will always befall him who loves unwisely.