hahahahaha! Yes, I do try to sit with a very straight back. I see so many retired people looking 10 years older than they are because they slouch....noses drooping onto their concave chests!
When I catch sight of myself in a shop window for instance I want to look sprightly and on my toes, not as though I'm about to keel over into my grave.
Thank you for the laugh! You have assessed my quite accurately.
I have however, a very naughty streak in my personality and love funny jokes, even when they are played on me.
Your English is pretty good. My second and third languages are ok but I cannot write in them as you do in English.
Well done.