'Yeah you may be good looking but you're not a piece of art' means a lot to me, as it could just be seen as they're not stunning, but also a piece of art is often interesting and challenges the norms, so it could also mean that the person is attractive in a conventional way, but not in a way that makes your jaw drop. It could also, however, mean that the person is only looks. A piece of art you often have to study or consider before you realise the true meaning or message, so to be a piece of art you would have to have a substance and not be stunning at first glance, but interesting to look at until you realise the beauty.
'Yeah you may be good looking but you're not a piece of art' means a lot to me, as it could just be seen as they're not stunning, but also a piece of art is often interesting and challenges the norms, so it could also mean that the person is attractive in a conventional way, but not in a way that makes your jaw drop. It could also, however, mean that the person is only looks. A piece of art you often have to study or consider before you realise the true meaning or message, so to be a piece of art you would have to have a substance and not be stunning at first glance, but interesting to look at until you realise the beauty.