Generally it should be avoided like the plague. However, honourable exceptions have to be made for the godlike genuis of Rolf Harris and the USA's greatest living writer of children's songs for adults, Jonathan Richman. I remember, years ago, standing in an audience of grown ups all pretending to be little aeroplanes at one of his gigs. I bet very few of them - me included - would have dreamed of doing it if it had been anyone but Jonathan.

Meanwhile, here come the martian martians...

Cheers

Nigel