The majority of my day-to-day bookings are two hour ones which I like, but I once saw a man who had obviously taken Viagra or something similar and it was NON-STOP with me on top the whole time - literally banging away for pretty much the full two hours. Apart from being so boring I ended up going through album track listings in my head, I was more exhausted than I would have thought possible and the next day I could hardly move my arms and legs - so you can imagine what the more delicate bits were like! I couldn't possibly have worked and that was just after two hours, so I do wish men would warn us if they have to take the bloody stuff!
I use a lube called Maximus at the moment which I like - it comes in a pump bottle so you can get at it with one hand, is nice and thick and doesn't go watery or tacky for ages - plus it tastes OK! You can get it at
http://www.cheapercondoms.co.uk/ and their condoms aren't bad either. I know a lot of people like the silicon ones but I haven't tried them - any recommendations welcome!
Nine hours is a long booking by anybody's standards if there was pretty much constant sex and no sleeping involved - it's going to be hard on your body (I don't think I could do it nowadays, but then I'm twice your age lol). Don't worry if you feel a bit strange afterwards both mentally and physically - just be assured that these are definitely the exception rather than the norm and the likelihood is that you won't have to do it again, at least not for a while. And don't be scared to turn longer bookings down if you do decide you don't like them - they sound lucrative, but they're not if they stop you working for the rest of the week.