The harder you thrust, the better.
Sex is not a carnival game. You do not win a prize based on how hard you hit the bell with your mallet. When you're on top, pounding away, we're not having fun. The iron-clad vaginas of PornHub may be down for sixty thrusts per minute, but in the real world, you'll rarely keep a woman wet by imitating what you see during your private late night screenings; you're just going to giver her internal rug burn.
Remember, gentlemen, porn is entertainment, not instruction. To avoid a situation that requires ointment, remind yourself that this is a real person under you, with live nerve endings. You listen, you connect with her, and you move based on her— instead of being all like, "HULK SMASH." The former will leave her satisfied, and the latter will leave her sore.