Wellllllllll, he may have sonic'd something or other (like an ATM) to borrow some cash since he usually didn't have any on him. But this was a date and like a good date, he knew he should buy her things. Like pretty dresses to show of her legs and things to make her smile.
And if he felt himself flush when she kissed his cheek, well... it was all part of the date, too. But she was talking and he was getting lost (in the good way!) with what she was saying and he thought of the two of them on Woman Wept-
"Brain waves, yes. They're very unique. We're very smart." And somewhat connected, symbiotically, a Timelord and his TARDIS. Yes, well... He turned toward the host. "Two, please. Under John Smith."