Ah -- I see your point. Clearly you're right about that structure he uses over and over. I guess when using it with non-homogeneous threesomes, there are certain patterns Rusty falls into regarding who plays which roles, but those don't come into play when it's three white men.

But regardless, when the guy whom everybody loves and who is a user toward the one who loves him is also set up as the moral authority with power over life and death, it's not quite the same as three guys who have no inherent inequalities. So maybe that's another problem with using that pattern in Doctor Who.