Dave Cummings, the elder statesman of smut, is the best case-scenario of why any old guy can get laid. And this seems to be his intent: "Look at me, I'm 58, and I'm doing it." On that basis, Gentleman Dave succeeds with an eclectic roster of performers (age-wise), all enjoying themselves.
The cradle-rocking element takes a back seat. Sure there's a younger girl/older guy motif, but it's Dave's laidback manner that gives this series overall stroke value.
His patented multi-mirror arrangement enables simultaneous trick-shots while shooting POV and performing. It's attention-span friendly as well; Dave keeps all 10 scenes under 10 minutes, throwing in intermittent pussy-play.