MAJOR ARTISTIC/CREATIVITY RULE:
This is a big one folks....
Unless you are teaching, participating in a class, or are involved in a commissioned shoot, do NOT suggest what photographs others should take...AND do NOT let others suggest what photographs you should be taking. Your images need to be original from start to finish. They need to express you. Telling someone what to create ruins the experience of seeing and discovery. One cannot attain higher dimensions when others interfere.
Only help when asked.