Blue Swede, to answer your question about how long. I believe the great thing about this position is that it really doesn't matter how long the lady takes, as long as she is enjoying herself. The man controls completely how excited he is going to get. He reaches a plateau of excitement and then slows his movements to just coast along at that level. If he needs more excitement he can either speed up or (my favourite) pull out until his cock head is only halfway in. While there he can feel everything you are doing to your clit and will probably have to hide inside you again quickly because it feels soooo nice! Because you are not moving your hips, he can 'cool off' by just lying still inside you.

Milady normally comes in a few minutes, so she is not going to stop at just one orgasm. As she gets more and more excited, she starts chasing my cock head inside her so that no matter if I am trying to move slowly and regularly, I have to come with her like it or not. Just a game - but a nice one. A slim vibe works well like this because she can squeeze it in beside me.