Courtesy is easy. Remember that every one is important as you. We all have some where to be and some where to go. If is not an emergency stand aside, open a door, help some one cross a street. It is so easy. Smile, say hello, say excuse me, it is so easy.
Maybe....the last guy I helped with a package, about 35 years old, followed me to my car & started to tell me what a great butt I had (I am 70!).
It gives one pause........
yeah, i suppose courtesy is different than helping. You have to choose your battles. And young guys who follow older ladies to comment on their bodies are the reason Pepper Spray was invented, and if that is too forward, Air Horns!