Many of them believe cybersex to be similar to pornography—an extension of fantasy that actually helps to keep them from physical affairs with other people.

And she'll have sex whenever you please -- as long as her battery doesn't run out.

Meet Roxxxy, who may be the world's most sophisticated talking female sex robot. "She doesn't vacuum or cook, but she does almost everything else," said her inventor, Douglas Hines, who unveiled Roxxxy last month at the Adult Entertainment Expo in Las Vegas, Nevada.

Online sexual activity can involve various activities, such as viewing explicitly sexual materials, participating in an exchange of ideas about sex, exchanging sexual messages, and online interactions with at least one other person with the intention of becoming sexually aroused.

In his stimulating paper, "Chatting Is Not Cheating," John Portmann defends online lust and characterizes about sex; he maintains that such talking is more similar to flirting than to having a sexual affair.

"There's really nothing like this on the market," said Hines, who speaks of his unique creation with what seems like genuine affection.

"Whenever she's out in public, everyone wants to talk to her and pose for pictures.Roxxxy also has sensors in her hands and genital areas -- yes, she is anatomically correct -- that will trigger vocal responses from her when touched. When someone speaks to Roxxxy, her computer converts the words to text and then uses pattern-recognition software to match them against a database containing hundreds of appropriate responses.The robot then answers aloud -- her prerecorded "voice" is supplied by an unnamed radio host -- through a loudspeaker hidden under her wig. It's very near real time, almost without delay," Hines said of the dynamics of human-Roxxxy conversation.Hines says a female sex therapist even contacted him about buying one for her patients.Roxxxy has been like catnip to talk-show hosts since her debut at AEE, the largest porn-industry convention in the country.Hines believes that Roxxxy is a step above other love dolls -- the similar but mute Real Doll costs about ,500 -- because her conversational abilities provide something close to emotional companionship. Shy, awkward or older men who "have trouble meeting girls," he says. True Companion claims that more than 4,000 men have placed pre-orders for Roxxxy robots, and another 20,000 or so have requested information about the product.