To become a resident, all users have to do is download the software, register a character and start exploring.
The idea is that you create a computer-generated version of yourself, called an avatar.
Founder Philip Rosedale of Linden Lab says he wanted to create a world "better than reality but without political or religious issues".
The best-known virtual world, Second Life is an online three-dimensional society created by its "residents".
Create a business, buy an island or become a cheerleader - this game is all about living your dreams.
Julie pode realizar ações como beijar, rir, dormir, e muito mais.
Crie uma conta e Julie vai se lembrar de você e conversar sobre qualquer tema.
Some 50,000 visit every day, for about four hours each.
It's become a prime space for big brands to target, with Vodafone planning to launch virtual telephones, the record company Sony BMG supplying music, and Adidas creating a virtual 3D version of their new Predator trainers.
"This is a hidden public health hazard exploding, in part, because very few are recognizing it as such or taking it seriously," Dr. As a result, the diagnosis of cybersex addiction is often missed, Dr. Especially vulnerable to becoming hooked on Internet sex, he wrote, are "those users whose sexuality may have been suppressed and limited all their lives [who] suddenly find an infinite supply of sexual opportunities" on the Internet. Dana Putnam, a psychologist in San Luis Obispo, Calif., said other factors that could increase a person's vulnerability to cybersex compulsion were depression and other forms of emotional distress, relationship problems and a failure to get one's sexual needs met. Schneider among 94 family members affected by cybersex addiction revealed that the problem could arise even among those in loving marriages with ample sexual opportunities.
"Sex on the Net is just so seductive and it's so easy to stumble upon it," she said.
But Ms Mc Lean said concerns about Roblox highlighted a broader issue."Any app or platform or game that allows two-way interaction between your child and another player is going to have predators on it," she said."And then the risk ramps up when you can have chat.