Cyclical

Religion is like sex; When amateurs do it it looks silly.
 
Which is why we have priests and pornstars.

Pontifical High Mass and Ben Dover.

But watching experts perform beautifully gets boring in the end. We want to muck in.

Muck being the operative word.

So along come people like John Wesley or Oral Roberts and- er- here the analogy probably breaks down- and they get the congregation to join in- singing hymns, speaking in tongues.

And it looks silly.