Questioning people about personal stuff often brings people together, it's how people make friends. My post is an off the cuff response that I didn't really care to have an answer too. He is good at documenting his fish, maybe he works with fish in some capacity? Maybe he runs a charter? If I cared enough I'd ask him out right, but as you say no one's business really. In his shoes I'd think haha suckers, I'm out here fishin everyday, these kids are so jealous. I feel like you're more offended for him, and I don't think you need to feel offended for anyone really, dive master is welcome to rip a strip off me himself. The mind your business thing works both ways man, but I forgive you.