especially considering how expensive it is to keep someone in prison for life, couldn't we try just buying him a mannequin?

From the NYT:

FERNDALE, Mich. (AP) -- A man who has a history of smashing windows to indulge his fetish for female mannequins could draw a long prison term for his latest arrest. Ronald A. Dotson, 39, of Detroit faces up to life in prison if convicted of a charge of attempted breaking and entering at a cleaning-supply company in the Detroit suburb of Ferndale. [...]

Dotson was arrested Oct. 9 after police say he smashed a window at a cleaning-supply company to get at a female mannequin dressed in a black and white French maid's uniform. He had been out of prison for less than a week.

Dotson was arrested in Ferndale in July 2000 and later convicted for breaking and entering at a women's clothing shop to get at a mannequin in a pink dress with bobbed hair.

Ferndale police also arrested Dotson in 1993 after finding him in an alley behind a woman's store with three lingerie-clad mannequins.