Some people just denies the right to pleasure. Zoo, bdsm, blowjob, whatever, even a handjob...
Sex only to procreate, or not sex at all.
But they may do all kind of bad things to other persons...
Respect.
That is what we are missing. Respect. If I do bdsm with other person, on a free basis, what the hell is the problem? The same for the zoo and all the rest of fantasies...
I dont understand scat, but if someone feel pleasure in eating shit, do it. I dont care, is not my problem, does not do arm to others, so I will not judge.
Just dont do any arm to others and be happy.