A Sleeping Scholar

Hmm, not sure I agree. For one thing, I've always liked that we have no idea whether the doctor is anatomically "correct", or at all sexually compatible with humans. We do know he *likes* them, and that we look enough, superficially, like timelords that he enjoys the company of pretty girls. I've never been absolutely convinced that the doctor has slept with any of his assistants. It has to be allowed that he may simply find flirtation fun, and the attention of pretty girls flattering.