Is it normal that i love the taste of posters?

I've been doing this for a while. I first started loving the smell of posters, especially the ones with the glossy ink. I then ate a piece at a dare in a party and now I can't even stop. It's first tastes dry and then the sweetly bitter film of ink settles onto my tongue and it tastes heavenly. I really don't think this is good for me and I'm not sure if this is normal.