Me: R. (younger son, aged 15)? What are those white things down the toilet?
R: I came home and had too many in my mouth so I spat them out down the toilet.
Me: Well now you can fish them out again.
R: Where shall I put them?
Me: In the bin.
See. I'm in control. Now where did I put my bins?
(There then followed a discussion as to why glasses are called bins. Feel free to contribute your own opinion on this.)