Do you ever feel "short" around "tall" people?
I'm almost 6ft, I have several taller relatives (males, I think I'm the tallest female).
I'm okay around taller people given that they are males, but every now and then I find myself out and about and come across a female taller than me and I suddenly feel short
but I find myself doing similar to you
"how's my posture?" "Am I standing as tall as I can?" "Can I stretch a little taller?"