"Molly?"
"Hmm?"
"What is love?"
"What?"
"I said, what is love? Can you not hear?"
"No, I can hear you just fine, I just never thought Sherlock Holmes would ask me a silly question like that!"
"Silly? Do you think love is silly?"
"I think it's silly when the person you love doesn't love you back. What's the point of loving someone who doesn't love you back?"
"And what's the point of giving up when you love someone?"
"Why are you asking all these odd questions, Sherlock?"
"Why do you think love is silly?"
"Oh, you're impossible, Sherlock!"
"I try."