This post is NSFW ... deals with human excretory functions ... so if you have sensitive individuals reading over your shoulder, best to warn them off and also rid the room of any small children. 

I just looked on Amazon for the price of toilet paper: $5.99 for 100 sheets.

I may have spent as much or more time in the "loo" than most any human in America. I will spare you the details in this post, just to focus on economics and convenience. 

Before I got my (portable) bidet, a couple of times I wound up using 1/2 or more of a whole roll of toilet paper just to finish wiping. Cost of this is (using Amazon's price:) $5.99 / 100 = $.59/100 sheets. Based on Amazon's price, that would be about 0.59 just for that one 'b.m.' This is not to mention the 1/2 hour or more to get this done. Now contrast to my last night's "Tushy" ... brand name of the portable bidet I use, NOT TO BE CONFUSED with Tushy.com, which is  an NSFW site. Google "Tushy bidets" if you want one. 

Last night I passed an, ahem, large bowel movement. With the bidet employed, I used 3.5 "Tushy towels" ... soft cotton that is sold with the Tushy. And 4 sheets of toilet paper. So total cost would be like 10 cents for toilet paper and 3 or 4 cents to launder the towels. So you could save 40 cents every time you go to the can!

I got the first one of these when my German-background wife got on me for the amount of toilet paper I was using. I explained that that's what it took. Then I looked into it after we stayed with some friends in Centralia who had a bidet plumbed into their toilet, which was a revelation. I got the first Tushy just after that last year, and I've been saving money ever since.

I wound up with two spare ones after my wife said she wasn't interested and I bought two extra by mistake.

So I have two of these for sale on Facebook. Call me 425-369-8286