A lot of the time, Jack's flirting is usually more subtle than direct pick-up lines. It comes in the forms of hellos and looks and quips. This time it's so direct that the Doctor actually has to pause and blink, holding up a finger between them.

Well.

"The beginning was actually clever. But yes, someone has told me." A pause, and a grin. "Me."

He knows very well how hot he is.