I had to look up what that means as I was only familiar with the meaning of "nonce" in cryptography. I think you are referring to this definition (wikipedia): "

I had to look up what that means as I was only familiar with the meaning of "nonce" in cryptography. I think you are referring to this definition (wikipedia): "Nonce, a slang term mainly used in Britain to describe people accused or convicted of sexual offences involving underage children" But being attracted to children-like looking fictional characters is not a the same as being a child sexual offender.