It is strictly a place for finding sex, which makes breaking the ice a lot easier.
You don't have to worry about the awkwardness or social consequences of openly soliciting sex because everyone on a sex site knows that's what they're there for.
There is probably someone who shares the same desires.
You don't have to worry about the stigma when you join an adult dating site for casual sex.
Those conversations are better suited for long walks on the beach.
Please refrain from cyber-sex in this room - thanks!