Answer:
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
The dirtier I get, the whiter I am. What am I?
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
Island hello
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.