Considering how short the whole scene is, only one fuck-position and camera-man almost missing the shot, I think we can easily assume Christy made the poor John prematurely ejaculate. Can't blame him, though
I love the way she goes out on that rock and does that little striptease -- then takes it all off before fucking him. There's just something sexy about a totally nude woman -- no shoes or anything. However, I hate the condom. I never understood the point of condoms in adult films. He pulls out, pulls the condom off and blows all over her -- that sorts defeats the whole purpose of it in the first place. And if you have to use the stupid things, why hide them? All the sudden, he's fucking her -- and has a condom on. Where'd it come from? If they HAD to use them, why not have her put it on him -- that can be fun, too.