Interesting tid bit

Here in England, at least in the homes I have visited, they use a 'bowl' (looks like a plastic bin) in their sinks. I asked my hosts about this, I'm curious since I have seen them in every home. They gave me multiple answers, for they didn't completely know themselves. Their mum did it so they do it.
Reasons:
1. Keeps pans from making noise in the sink
2. Use less water
3. If you drop anything it helps keep it from breaking on the hard sink counter
4. Don't have to lean as far down to wash the dishes
5. Wont scratch the sink

I think all of these make sense. However, after talking about it for a bit, my hosts decided that they think that the fact that you use less water is the correct reason for the use of the 'bowl' in the sink.

Thank you for your time :-)