When I hear someone say 'sir', I clinch my jaw. It's finger nails on a chalkboard. It's a shoe that looks fine on the outside.
Nobody sees anything wrong.
It looks good. But, the shoes pinches on the inside. The shoe rubs blisters. Since those outside can't feel the misfit shoe, they just see you stumbling and hear the complaining while remarking what nice shoes. Hormones are a strong, if not essential, help in mitigating 'sir'.