Default avatars have no genitalia, so users need to buy them.
Likewise, users can buy equipment, ranging from realistic-looking beds and other furniture to fanciful torture devices used in BDSM fantasies.
Soon, voice will be even easier in the virtual world -- Linden Lab is beta-testing voice integrated into Second Life, and plans to roll it out over the next few months.. Users can buy outfits to dress their avatars provocatively, or "skins" to make them appear nude.
Tiffany Widdershins is owner of one of Second Life's many bordellos.
I met with her in her Second Life office, a replica of Bill Clinton's White House Oval Office. In addition to the Oval Office, her virtual bordello includes a bunny ranch modeled after a Vegas brothel, a locker room "complete with coach's office and showers," an area with a desert romance theme, and club and mall, she said.
The hype is familiar by now: You can do anything in Second Life: Go parachuting, go surfing, build a majestic building, fight vampires. As with every medium since cave paintings, sex is a big part of Second Life.
The virtual world is a haven where people can fulfill their sexual fantasies by pretending to be the opposite sex, experimenting with homosexuality, owning a harem of sex slaves (who are themselves fulfilling their fantasies by role-playing as sex slaves), and more.
"The stuff that really seems to go is the kinky stuff,"says Widdershins.