[He puffs up his chest proudly at being considered a man of the sea!]

I guess I am! [He's flattered that she's going for the houseboat instead. If also self conscious.] I'd be happy to give you a tour anytime. ...A-anytime that's planned in advance! [...So he has time to tidy up and make sure no one gets in the way. He's already embarrassed thinking about some messes around the house she could come across.

And then as she leans towards him and asks that question, he blushes and becomes shy again.]

Hmmm, th-that's a tough one! A-all your smiles are so pretty...! [His sincerity rings in his words, at least.]