There are some absorbent underpads that are sold at most drugstores, in the adult diaper isle. You spread them out underneath you, and believe me, I have never filled one up too much, and my hubby can make me go like 10-20 times, until I pass out.
http://www.fetishclub.com/exchange/f...culation.shtml That's a really good link to see how to do it, it's amazing. Oops, I have to go :P