[lofaszvanitt]

Art is something that grabs you and is also unique in the way it presents the subject. Also, there has to be skill involved, otherwise the whole thing goes up in smoke if it feels cheap or superficial.

A banana on the wall is not art, because it involves an everyday object in an everyday setting.

You might feel it's art, but if that's the case, then you haven't exposed yourself to true art enough to have a pool of experience or only seen so far superficial examples.