@float^ Thank you for this exhaustive reply - I remember reading about this - I have caught myself out in doing this a number of times, but we are not as self-observant as we think we are. I have had a number of deeply embarrassing moments in my life (to me, to others probably funny ) - and I have tried to re-tell, but am unable to do so, I have forgotten the detail, probably there is an 'eraser' at work in people's brains, too. Thanks Tau