This all seems very plausible to me. Especially the part where meeting snarky, wily Fritz ratcheted up Voltaire's interest. For all that these two complain about each other's sharp edges, I really think if they hadn't been there, some of the appeal would have been gone.

It also kills any remaining sexual interest in Marwitz on his part, because Hohenzollerns are fucked up like that.

This made me laugh out loud.