Dude must have the longest gorilla arms, ever. He can put his face in her chest and grab her ass at the same time, despite her elongated torso. Think about it.
This was awesome. But the nerd in me can't help pointing out that this scenario has an unsustainable rate of population growth. Assuming he's physically capable of having sex with all of them (which in the hentai world it wouldn't matter if there were a million of them, he'd be able to do it all in a single day regardless), then within a week (7 days) he'd 64 hot girls running around. Within a year, there's be more of them than humans.
Only one conclusion can be drawn, gentlemen: ALIEN INVASION!!! (And yet I find myself quite okay with that.)