Lesbians are quite common in Second Life. Yours truely knew personally no less than 5 sims dedicated to lesbians, and lesbians only. (Males are forbidden)
above: A woman setting her eyes on a girl's ass.
Sex is not just for heterosexuals. In this anonymous fantasy land, true nature shows itself quite openly sans social restrictions.
In mere 2 weeks time (about 11 hours per day), yours truely discovered how great numbers there are of lipstick lesbians↗ or bisexuals girls. (this impression is purely empirical and is of course not a substantial observation. Also, since i'm not interested in having sex with men, i have not yet ventured forth into the exploration of male gay communities.)
In a virtual world, meeting new people is far less costly than in real life. You could meet a lot people and get to know them in a short time. (after all, you can literally fly in Second Life) And in a virtual world, people are less finicky about their true nature. (since there's little to no risk; as opposed to real life's risks of reputation or job or time-drain or emotional stress (for example, suppose a very personal embarrassing moment came up in Second Life, or someone made you angry, you can simply =poof= and disappear and reappear somewhere else, and leave your antagonists to gawk at the empty space that once was you)) So, in a way, you learn about people's desires and heart far faster and quicker than in real life.
A virtual world environment such as Second Life, therefore, can be a platform for psychological or behavior research thru statistical means.
above: 4 lesbians doing it, on a massive double-king-sized bed.
above: Fisting↗. Since the unstoppable force of communication ushered by the internet in the past decade (~1995-2005), the (possibly wide-spread) practice of inserting hand into vagina has entered public consciousness.