Call it "Big Brother" meets "The Best Little Whorehouse in Texas." Reuters reports that HBO will air a documentary next month in which patrons of a Nevada brothel happily appear on camera negotiating and consorting with prostitutes. "Cathouse," a one-hour special that HBO will telecast after the season finale of its mob drama "The Sopranos" on December 8th, takes viewers behind closed doors at the Moonlite Bunny Ranch in Carson City, Nevada, where prostitution is legal. The film is part of HBO's "America Undercover" documentary series.

Amazingly for a business in which a premium is placed on confidentiality, nearly all the 50 some clients secretly filmed while haggling with the "working girls" of the Bunny Ranch signed consent forms allowing HBO to show them on screen. Among them were a mother who brings her 22-year-old son to the ranch to lose his virginity, a married couple celebrating their 15th anniversary with a menage a trois, a widower who has gone without sex for two years and just wants to be cuddled, and a pimp who tries coaxing away one of the girls.

No X-rated sexual acts are shown. What viewers will see is a mix of bargaining, seduction, provocative touching and nervous laughter, up through and including payment -- in advance -- to Madam Suzette. Also caught on tape are the surprised reactions of the patrons when Suzette announces they've been filmed and are welcome to appear in a TV documentary. Producer-director Patti Kaplan said she was astonished that only three declined.