Its A Physiologist Question. My Sister Pointed Out That All

its a physiologist question. my sister pointed out that all the p aintings and pictures in my house were of people with their backs turned i.e 2 children walking away or a lady looking in a mirror but I only get a glimpse of her face. the backviews basically - I cannot see the subjects face. my sister commented on it as we were looking at wooden statues for the garden. everyone picked an owl etc. but I choose a knight in armour - it drew me as I couldn't see the eyes. why does this mean?