It is rude to grunt.
James is in front of a large TV that needs to be put on a TV stand and it is too heavy to a person to lift it silently.
James wants to setup the TV today.
James asks for help and lifts the TV without making a loud noise.
James lifts the TV by himself and makes a loud noise.
His friends are happy they were able to setup the TV and are pleased with James.
The friends around James are appalled by his noise making.