@Iluviaporos - I actually find that a bidet is cleaner than using toilet tissue anyway. It might not seem that way since you are possibly going to be using your hand in places you might not really want it to go, but afterwards you're going to be washing that hand in soap anyway, right?
And the article is right, toilet tissue does tend to just move bacteria around, while the water actually washes it away.
Plus it is far better for the environment, particularly if you are in a developing country, where they don't have sophisticated sewers designed to take a lot of toilet tissue.
Honestly, I swore I would never use one, but I was completely converted on my trip. The only problem is getting used to toilet tissue again when you come home. I found it almost painfully scratchy after that.