How to deal with a PA: three options

Hey, need advice:

How do i deal with a PA. I want him to stop..for many obvious reasons.
What is the best way to do that?

a) set boundary:
extreme example: use no-internet phone or no sex with me
soft-example: allow him to trial and error his ways to stop using porn but insist he put effort in the recovery...or else no sex.

b) gradually brainwash him, but still remain okay with his porn usage...while i have panic attacks from time to time.

c) Do nothing. Detach emotionally and maybe physically too. Let him crash and burn until he wakes up one day as a phoenix

Thanks!