Survey the sex lives of Homo sapiens, and you’ll find couples, throuples, harems, and other arrangements of lovers. Fidelity, adultery, and ethically non-monogamous unions. How could one species have evolved myriad ways to mate? Concerning sex, what is natural for us humans?
I always thought it was interesting that there are so many harems in second life. It seems to be a fantasy for many people.