I see two (at one point, I saw three). It works for me. I tend to be dependent, so it helps me to have more than one t to go to with stuff. They have different styles and approaches, one is a man, one a woman (which is good because of my stuff).

They do not talk to each other, but both know I see the other. T1 will ask about what I am doing with T3, but T3 rarely asks about T1. Sometimes I talk to both of them about an issue, sometimes I chose to talk about different stuff with each one.

I do not let them talk to each other. It's a trust issue for me. It would probably be ok, and I doubt they would do so very often, but I have not signed the permission form for them to do so.