My favorite sex position to see is face to face, with the girl pressed up against the guy, or with her legs rapped around his back, preferably in a sitting position, or with the guy standing and holding the girl up. Here's some pictures I what im talking about.
And in honor of page 69. (Same girl from the second image i posted, fucking loved that eroge, it was totally what got me into demon girls ooooh so long ago.)