[Rin tunes most of that out. While he's hardly a sloucher when it comes to matters of anatomy and physiology, now is not the time. In fact, it comes across as of an excuse for the lack of progress. And there's no way he's going to let Rei use that as a crutch.]

Ah, knock all that off. It doesn't matter that we're different species, the concept is the same. You have to move it smoothly. Hell, even eels can pull that off.

Just do what I told you.