Yes, I know that this might be pedantic. And ‘correct use’ is an ultimately flawed concept given that our current usage is a collection of vestigial literary aberrations throughout the language’s history. And of course it is the ideas and passion behind a piece of writing rather than this surface crap that really matters. Nonetheless you must admit you do look like a bit of cock when you write banana’s. Unless you’re talking about something that the banana possesses of course. E.g. “If there’s any fruit’s skin most associated with physical comedy, it’s the banana’s”.