It depends on what it is a part of. If it is being taken to help diagnose a condition, someone is sick and might have a fever, then it is not kinky anal play. It is still considered the 'Gold Standard' of body temperature determination, so why not use the best?
But, if it part of a play, say a play exam, then, of course it is anal play. Whether it is 'kinky'... well, I don't think so; but that is my opinion. To a large extent, 'kinkiness' is subjective :D .