For animation playback? There is. Once the animation menu open when a sex scene starts, one of the options further down on the list plays all parts of the entire scene consecutively in order. At the end of the animation is loops the final part. If you select any part of the animation from the list it loops.
A more valid question is, what equipment is worth the grind and is it a short grind? I remember playing this game, realizing I could craft armor, then realizing the grind looked freaky bad for early gear. And so the rest of the game went without armor because I cheat-speedran it. Yet I still recognized it was a good and challenging game.