Two people are in Second Life and dance. They both are attached to a SIM with very close properties. Also to an IM channel they are sharing. They also have an animation which has a relationship. All three relations can be defined perfectly in a Turing Machine, thus we have Second Life on the GRID running on computers.
This simple network can represent anything other than dancing. Once I showed someone in Second Life how to dance and they said it was "just like sex." Sex and dancing are technically the same issue in Second Life.
This is the key strucutre. You want to get people "near", "connected" and finally "co-animated" if you want to form bonds in a virtual relationship.
A picture in SL of it might look better.
The Second Life Great Expedition
Rober1236 Jua the Cyber Trekker of Second Life