The two variables aren't distinct; bisexuality in this case is a "symptom" of a particular kind of sociopathy. (The reason the odds aren't much closer, however, is that "adaptive sociopathy" has been buried under garbage on the internet since Hannibal made sociopathy "cool", and I'm unable to relocate -any- sources, definitive or otherwise, on the subject since my last research. I may have to resort to textbooks.)

Adaptive sociopaths would find virtue ethics trivial to implement, as it is characterized, effectively, by extremely effective emulation of others. It's a brand of ethics which is particularly well suited to them.