Well this one certainly got you all thinking! Of course none of you let me down. I'm really impressed! And yes this was a genuine question lifted straight from the dfee PCM for literacy in Year1 along with other such enigmas as Do ducks(!!!!) have tin legs? and Do you live on Mars? I don't know what they were on when they thought them up but I want some!! Nothing wrong with using Guiness on your slugs - just because you want to kill the buggers doesn't mean you have to be unkind and at least you're not using Old Peculiar-now that would get 'em going!!