The image is there because that article references the Harkness Test, which initiated with:
Fans of furry pornography commonly distinguish it from zoophilia or bestiality, emphasizing that their interest is toward fictional characters depicted as sapient beings with human-like traits rather than real animals.
It’s more about "could give consent".
Fictional creatures can never give consent for real (because they’re fictional) and we cannot know if they would if they were real.
Yes, but that’s not how sexual fantasies work. There are probably few people who only masturbate to real people, who gave them permission to masturbate to them.