As a Peace Corps volunteer I became very proficient at using the squat toilet (as a former Peace Corps volunteer I also have no problem discussing bodily functions, smile). Back in the United States I didn't give a second thought to squatting until I became pregnant with my second. At my prenatal yoga training the instructor Mary Barnes mentioned she spent a lot of time helping women learn how to relax the pelvic floor (pushing is more effective with a relaxed pelvic floor) and that the best way to do this was on the toilet. Taking this one step further, I think the toilet is also a great way to learn the benefits of the squatting position, not just for pooping, but for giving birth.
I don't think you need to run out and buy Nature's Platform but their site has some good information on the benefits of pooping while squatting. Scroll down the page to see the picture of the rectum straightened by squatting. Your birth canal is very similar. Squatting not only makes gravity work in your favor, it tilts the uterus and pelvis forward, placing the baby in proper alignment for birth (similar to the rectum straightening for better elimination).
So the next time you have to poop, grab a stool, place it in front of the toilet, and put your feet on it, spread apart, so that you are squatting on the toilet. You might be surprised how much easier it is to poop! Now if squatting helps pooping, imagine how useful squatting might be when it comes time to give birth. And don't forget to practice relaxing the pelvic floor while you're there!