A young man in a white hat is playing golf with an older man wearing a blue, long-sleeved shirt and khakis.
There is an older man teaching his grandson how to play golf.
Older mean helping younger men are not always teaching their grandson.
Just because the older man is teaching the younger man to play golf does not mean it is his grandson.
An older man may play golf with a young man who is not his grandson.  Just because one golf player is older does not mean that he is teaching the younger man how to play golf.