"Ah, you've raised an entirely different issue.  Public exhibition of lust I would find most distasteful, either as participant or spectator... but I grok this reflects my early indoctrination, nothing more.  A very large minority of mankind - possibly a majority - do not share my taste in this matter.  Decidedly not - for the orgy has a long and very widespread history.  Nonetheless it is not to my taste.  But shocking?  My dear sir, I can be shocked only by that which offends me ethically.  Ethical questions are subject to logic - but this is a matter of taste and the old saw is in point - "de gusribus non est disputandu."