IN BURLESQUE:

A master of ceremonies/comedian who would 'warm-up' the crowd with bawdy jokes and witty banter in preparation for the dancing girls.

IN REAL ESTATE:

One who prepares a house for sale, employing cosmetic skills, such as hedge pruning, or psychological tactics, such as baking bread while the house is being shown.

ACCORDING TO FREUD:

One who provides ego reinforcement.

IN PORNOGRAPHY:

One who provides the necessary stimulation to enable a male porn star to perform.