Au contraire.

http://blog.wired.com/business/2008/07/turns-out-por-1.html

Did you read the first paragraph?

  ...they're also competing with a nearly infinite supply of free, amateur videos from countless user-generated sites

e.g. youporn.com

Consumption of porn is recession proof. The business of professional porn generation is not. Like other produced content, it is suffering from democratized tools of generation and dissemination.

Except youporn doesn't exactly have the most solid business model, as the article states. You might still be out of a job.

It might be recession resistant but many of the mainstream porn companies are having trouble right now because of increased competition and also because of the huge amount of free content that can be found on the web via these tube sites.