Anakin loves and adores his wife, but having spent the previous decade mooning over pictures of Padme instead of going out and getting laid, his enthusiasm outpaces his sexual knowledge. Padme was in politics from a very young age, constantly surrounded by servants and bodyguards and piles of paperwork, and though she thinks she's satisfied, she doesn't exactly know what she's missing either.

Obi-Wan on the other hand had no such hang-ups or obstructions in his youth, and as a result is a warrior space monk who knows his way around. When Anakin and Padme manage to get him into bed with them, they have quite the awakening. ("Master? Where are you going? Why are you down there? Wait, that's a thing you can do? Can you do it to me next??")