Originally Posted by CurrentlySober

OK, here's how I used to do it back in the day - No reason whatsoever it wouldn't work the same today...

Site 1 is your 'taboo' site
Site 2 is your cookie cutter bland vanilla tame porn site.

When customer joins site 2, the user/pass also works for Site 1, as you sync files via a cronjob...

For all apparent purposes, to the untrained eye, and to the biller, the sites are in no way connected...

Wanna really 'live dangerously push the boat out? Really sail close to the wind? Feel a turd in your pants? Push the envelope, & hit the limits?

Well, iframe the join box from site 2, onto site 1...

Woot! Mind Blown!