The Sex Thief (1973)

He stole their jewels. All they reported was the robbery.

A struggling pulp fiction writer who doubles as an incompetent jewel thief. He gets caught in the act every time, but he uses his looks and charm to make the best of it. Soon he becomes a celebrity. Wealthy women start leaving their jewels out like milk and cookies for Santa Claus in hopes that the sex thief will unlawfully invade their domiciles.