Quote Originally Posted by Thorne View Post
If one, or both, are involved with someone else, the chances are remote.
I don't agree with this at all given the context of the OP's question. It makes no difference if one or both of the parties (friends) are involved with other people. If they are friends, there will most likely be some sort of sexual tension. No matter what their status is outside of that friendship. Whether they choose to ACT on it MAY depend on what their status is...but not whether or not the tension is there.