When you have two girls and 3 guys(one gay, one bi, and one straight.) The first guy takes it in the ass from the girl who has a strap-on while the girl is being done by the bisexual guy. The second girl is doing the bisexual guy while the straight guy does the second girl in the ass. It's all anal of course.
We called an escort service and asked if they had a couple girls to do the wang-train, they hung up immediately!