A (sexual) fetish that only exists within the realms of imagination, artistic expression, and fantasy.
Someone that enjoys seeing certain (sexual) fetishes depicted artistically, may not like any of the same things in real life.
I love drawing pictures of cute, girly boys in sexual situations; But in real life, I only like girls. So It's really just an art fetish for me.
A fetish that exists only in the realm of art. A person with an art fetish may, or may not have any of the same fetishes in real life.
I like drawing big breasts on my female characters, but in real life I prefer smaller more manageable breasts. Big boobs are just an Art fetish for me.