It dawns on Han that he's being caught with his pants down in more ways than one. He didn't want her to pick up on the fact that he's a tad nervous. That he doesn't really do this all that often. That the unphased pilot in the cantina might be an insecure young man under all the shielding.

So he smiles his lopsided smile, the one that he counts on to cover over so much, and looks her right in the eyes.

"I don't see no reason why we can't go full tilt." He says in those saccharine tones that his voice gets when he's speaking softly. "We can always slow down later."