My Darling Wife was the one who originally suggested we try anal. I think she had been watching "that" episode of 'Sex and the City' before we went to bed. (Thank you, HBO!).
Well she really got off on it, and it's now a fairly regular item on our menu. You really need to find a good lubricant though.
We had been using KY but it always felt a bit too sticky, it dries out, and it also makes some unsavoury noises if you use enough of it! We didn't really know of anything better, until MDW went out on a "Hen's Night" and all the girls insisted on going to an Adult Products Shop. MDW came home with the tiniest bottle of a lube called 'BodyGlide'. This is a silicone lube which never feels wet, doesn't dry out and is just amazingly slippery. We couldn't wait to try try it and it just blew us away. If we thought Anal was good before, we think it's fantastic now. Even more sensation, and none of those farty noises.
Cheers, Luigi.