Oh, you get me going.

I love long sessions! I have enjoyed multiple sessions for up to over a week, with one single partner or with multiple partners.
The one thing that I have learnt is, long sessions need a lot of planning and preparation, but they never go according to plan, despite all the experiences and the fact that we know each others. And that is perfectly fine!

Usually we switch between intensive play and easier play and also some time off like visiting restaurants...
I have spent a full week in a strait-jacket (4 days of which without interruption and the rest with some breaks).

Overall, the dynamic in a long session is very different. Up to 3-4 hours one can run on endorphins, but not for a week. So what I call "intensive" still is in the realm of keeping the session going. Like breaking skin is a no-go, because the session just doesn't allow for taking care of an open wound.

During such long sessions I always had times where I swore to never do something so crazy ever again.
But in the end I always left it with a big grin on my face!