While researching Omuboro, I came across treehugger.com's page on How to Green Your Sex Life. They have some good tips worth reading.

There's a rundown of potential problems with PVC sex toys, discussion of green lubes and vegan condoms (most contain milk products). They mention luxurious bamboo sheets (As a bamboo fetishist, I'm curious to try those).

A few other tips they suggest: save water by showering with a friend, try fair-trade chocolate or a natural aphrodisiac. Sounds good to us.