I've had a quick look through for other threads that might give me the answer I want, but if I've managed to miss one then please be gentle on a newb!
We bought a lovely purple PVC bed sheet as a wedding aniversary pressie to ourselves.
Warm bath, warmed (on the radiator) sheet and a bottle of baby oil in a jug of hot water. Went from the bath straight into the "play room" - we've got a spare bedroom that we've been able to keep clear of anything other than an old matress on the floor and a supply of toys - sprayed plenty of baby oil on the sheet, and eachother, then spent an hour and a half being generally very naughty.
Loads of fun and laughs. Lots of positions that simply don't work due to lack of grip, but lots of ones that we sort of slipped into that we hadn't tried before. Baby oil tastes a lot better than either of us thought it would and made no-holes-barred access for both of us a simple matter of think about doing something and it happens. Our normal relationship, with her well and truly in charge in the bedroom and me happy to do/take what I'm told to, evened itself out and this was far more of a mutual enjoyment session than we've had for a long time. We're both now fully paid up members of the oily sex club!
The problem came when it was time to get back in the shower to wash the oil off. 10 minutes of scrubbing got it from our skin, but no amount of shampoo would clean her hair properly. In the end she resorted to washing up liquid, followed by loads of conditioner. She's understandably very proud of her hair and I know she doesn't want to do that if she can avoid it.
So, what can we use instead of baby oil?
I thought of waterbased lube and extra water, but I'm not sure it wouldn't go sticky after a while. Silicone lube should last longer (I think), but to be completely honest I'm too tight to pay that much for something that might not clean out of her hair that well anyway.
Who's tried this and found an alternative that we can both live with, but still have hours of slippery fun?