I have two sons, one twenty-one and the other sixteen. They have been taught you open and hold doors for women and the elderly or if someone has their arms full of groceries etc...
I have also told them some women may turn on them for it if they do just apologize and tell them sorry I usually only do this for ladies and walk off and not to let one or two horses a$$e$ deter them from being gentleman.
LOL!....I'm gonna remember that!...........
They could also say, "I do this for ALL elderly people."..............