This is all down to your personality and the way you motivate them.
Hard to explain, you either have it or you do not. Sometimes it can be down to the models, but more often it's down to the shooter.
For instance how relaxed are you with the equipment?
Do you know how to direct them so it looks like it's undirected?
It can sometimes be hard to get actual lovers to make love for real in front of a camera.
