Oh, that was so very the Doctor. Caught up in a moment that other things were left behind. In this case, a rather nice drink that he should've put down before.

He padded at the red liquid on his tuxedo---well, it was about time he had it cleaned at any rate---and sighed.

"Well, no need to worry, we'll just get you into the TARDIS, get you out of those clothes."

A pause.

And, hastily added, "To clean! To clean the dress!"