To the twitter handwringers defending the NSPCC fetishist and saying grown ups should be allowed to practice their kinks in private between consenting adults.
If something is on the internet it is, by definition, not private.
If sexual activity takes place in the workplace it is not private.
If part of the kink is exhibitionism then by definition it involves people who have not consented.
If an individual who has unusual sexual preferences does not understand and adhere to these basic truths they have no place in any workplace, and especially not one that professes to prevent cruelty to children.