My teenaged son is an avid fisherman. He has gotten pretty savvy about baits and lures, how to troll, and good spots for catching fish. An acquaintance asked me for his secrets. I refused. Then her husband called my son directly to ask him what lures he uses and where he's catching fish. I'm just the mother but I'm wondering: isn't there some kind of unwritten code about not pressing others for specific fishing secrets?