In a nutshell, If zoo sounds to you as "kink", "extreme" and "taboo", it will take most of the interest. If it sounds to you as "natural" "loving" and "bonding" it should not have a great effect.
By this definition, I would only take the appeal to 98% of people here, watching zoo porn "cause it is so dirty and a kink"
Those who are into this for real and do not specially care about others liking or not, it is a persoal thing that does not need to show outside, so no real diference in the legal part except the tension of consequences.
Personally, if it was not taboo, I would have it easier to find like minded people and likely be even more into it.