Conversations we 'd had before about what our erogenous zones were led me specifically to that area . The fingers of her hand closest to me began tapping in rhythm to the almost sacred waltz of " Your Hand in Mine " . My eyes drifted to hers , which darted away quickly to the top corner of the ceiling as she began to bite her bottom lip .

Generate a question about the above context.
Why is the person moving to erogenous zones ?