Wow! I'd love to know where this came from with sound. IAFD only lists a silent version of this scene.
I'm old enough to remember these girls - I don't know if this is one of the first pornos I ever saw, but it's certainly from that era. I first started looking at porn movies back when porn theaters (yes, they actually used to have those) were switching from silent super-8 loops to VHS videos. There were actually some really hot girls back in the day, and unlike now, they left some hair down there, which I think is way sexier. It's too bad the porn world just didn't have the technology and filmmaking ability they do now. Some of the classic porn stars shot Nubile Films or X-Art style would be mind-blowing!