There are no rules.
If you don't have anything specific in mind about your picture, that's okay; if you do feel you made it to illustrate something in particular or that, by chance, it does that on its own, why shouldn't you have the added pleasure of pointing that out?
Third parties are ever at liberty to make of anything whatever they will, which is also interesting, and alternative titles from a sophisticated/perceptive third party can jolt the creator into a surprise about his/her own production.
The concept of 'leaving it orphaned' strikes me as the result of the author not really knowing what the hell he was trying to do or, perhaps, knowing that he didn't pull it off. But again, as I wrote, there are no rules - thank goodness.
Rob C