Plenty of people have fetishes ranging from the distasteful (rape, both from the perspective of the rapist and the victim, cuckolding, etc) to the absolutely bizarre (inflation? transformation? vore? what the fuck, who comes up with this shit?) that they have absolutely no desire to participate in in reality. It exists purely as fantasy for them, never admitted to anyone but strangers on the internet or perhaps a very accepting (or similarly deviant) partner.

Of course this is the case. You don't hear stories about strange men chasing people down with bicycle pumps, do you?

In other words, it's almost as if the average person understands the line between fantasy and reality! What a relief, maybe they aren't all ticking time bombs after all.