Interesting topic! I've had two long term relationships where we made porn for our own consumption. The first of these two, we were together two and a half years, and made porn at least twice a month, sometimes more. Almost the entirety of our porn was her eating my ass or taking facials. How often we made porn was pretty steady.

The second one is my current girlfriend. We've been together almost 3 years. We made a ton of porn early on; and had much more "porn sex" in the first year and a half. I don't cum on her face nearly as often anymore. She takes facials to make me happy, but doesn't particularly enjoy them; so she's less and less in the mood to say yes. But she still lets me video them. But we probably make porn one night every 3-4 months now. Relationships have ebbs and flows, and in this case our porn output definitely peaked during our "honeymoon" period when we first started dating for the first year and a half. I definitely could make porn more often if I wanted to; but I reckon it just fades a little bit with time; which feeds into what kalvin45 said in his original post.

All the other women I made porn with were either relationships or fuck buddies that lasted in the 6 month range; which meant we frequently made porn, but weren't together long enough to know how regularly we'd continue to do it.