Answer:
I plow and plow but never sow.
I come out of the earth, I am sold in the market. The one who buys me cuts my tail, takes off my suit of silk, and weeps beside me when I am dead. What am I?
I am a kind of coat that can only be put on when wet. What am I?
The more you take, the more you leave behind. What are they?
Keep doing me to avoid lens dryness
I am your mother's brother's only brother in law. Who am I?