You're in the supermarket or similar sort of place..a blast of "two hearts" by Phil Collins or maybe "Lady in Red" by Chris De Burgh hits you as you reach the cut price sausages..
Do you suddenly sing along to it and maybe perform a little dance..?
I have one friend and one mother of mine who undertakes in such past times..am I right to be a bit concerned? 
When I say dancing..I suppose what I mean is:
