Just so long as you ain't hurting it - it's alive. Not that I need to worry since the TARDIS is too, but...best not piss it off lest we want to wake up under the sea again, eh? This time we might have mermaid tails. You could end up a merboy.
It's like something's taking hold of everyone on the train. Haven't you noticed? Tempers being up, paranoia setting in...libidos taking over...