It's a play on words:
either, as stated, circa 'Each to his own' (taste = Geschmack)
OR,
Each to his own jewellery/decoration (jewellery = Schmuck)

aside:
I've never quite got over 'Schmuck' for something that should be beautiful, its a bit like the German word for butterfly. I use Juwelen if possible but that's closer to jewels in English.