8 XXX : edging

The [source video](https://www.pornhub.com/view_video.php?viewkey=ph594483ce8d840&pkey=40851922) of this gif is from episode 7 of a series on handjob techniques filmed by my wife and I. If your are interested in seeing more of our work, [here is the link to the playlist](https://www.pornhub.com/playlist/40851922).
That's incredibly erotic! Well done! I've searched often for videos of cocks fucking hands rather than hands stroking cocks. Haven't found much. Can anyone point me to or post GIFs of that?
This looks like torture! What's the most number of hours I can sign up for at one time?