NEW YORK (Reuters) - Sex tech, titillating toys and porn stars featured in a seedy carnival of carnal pleasures across the street from Madison Square Garden on Saturday at New York's first Erotic Expo.

More than 50 exhibitors set up shop next to the Hotel Pennsylvania to strut their stuff in a ragged, flea market setting one flight up from the street and grab a piece of what organizers say is a $40 billion worldwide sex market.

Tera Patrick, Britney Rears and Tiffany Mynx were among the popular porno queens posing for pictures with fans in the two-day event that ended Saturday, while product innovators flogged everything from patented condoms to art object dildos, and an exercise program devised to make a man's private parts bigger.

In sizing the sex industry market at $40 billion, the organizers include topless clubs, exotic dancing, sex toys, party goods, books and pornographic movies.

A crowd of mainly young- to middle-aged men shuffled by the stations to ogle hard-core movie stars and sex accessories.

Mynx, showing off her features in a scanty costume, flexed her muscular derriere and encouraged a woman who asked to pose for a picture with her to go ahead, grab it, squeeze it.

On the counter were copies of her films including Tales from the Crack, and Weapons of Ass Destruction.

Leon Kassman, who boasts having 12 sex product patents, displayed his latest invention, the hermaphrodite condom, designed to heighten sexual pleasure of both partners after air is pumped or blown into a thin prophylactic, filling ridges and adding length and girth, and presumably mirth.

Kassman said new products are presented to a medical school's industrial review board for approval