"A milkshake"

She chuckles, clearly not having expected this response. "I suppose next you're going to tell me that there's an ostrich behind you." You take your hand off the referred-to book, looking behind you out of confoundment - is there actually an ostrich behind you? Searching thoroughly and establishing the non-existence of said ostrich, you turn back to her; "oh, I suppose you actually mean this letter. I don't know, but I'm also not certain that it's any of your business."

She stares at you unblinkingly, until eventually you're forced to blink your drying eyes and turn your head slightly, just in time for her to speak, "I don't suppose you'll tell me what's in the letter?"

After a moment of thought, you shake your head: no. "Ah well then, let me just start filling out this form. Are you into men, women, or both?" She sits down and grabs a pen, starting to fill out information, and looks up at you, expectantly.