Have these dishes ever been washed?

A mother's bachelor son invited her over for a meal. A mother's bachelor son invited her over for a meal. He had just gotten two new dogs and wanted his mom to see them. When she sat down at the table, she noticed that the dishes were the dirtiest that she had ever seen in her life. "Have these dishes ever been washed?" she asked, running her fingers over the grit and grime. "They're as clean as soap and water could get them," he answered. She felt a bit apprehensive but started eating anyway. The food was really delicious, and she said so, despite the dirty dishes. When dinner was over, her son took the dishes, put them on the foot, whistled, and yelled, "Here, Soap! Here, Water!"