Explain why this scene is humorous. "His meal being ended, a lord came and held before him a broad, shallow, golden dish with fragrant rosewater in it, to cleanse his mouth and fingers with; and my lord the Hereditary Diaperer stood by with a napkin for his use. Tom gazed at the dish a puzzled moment or two, then raised it to his lips, and gravely took a draught. Then he returned it to the waiting lord, and said—
'Nay, it likes me not, my lord: it hath a pretty flavour, but it wanteth strength.'"