The problem of the floating space bowel

In The Museum: Toilet Training | Space Exploration | Air & Space Magazine

Having read quite a bit about the space program in my time, I knew most of the information in the above short article on the history of zero-g toilets, except this bit:

The space shuttle’s toilets are based on the Skylab model, and also operate with a fan and a vacuum. “No matter how much training you’ve had on the ground in how to operate it,” says Neal, “it’s difficult to actually use the first time. So when you finally do succeed, there’s a bit of celebration; they announce to everybody, ‘Okay, I went!’ It’s an accomplishment to master it in microgravity.”

On this ESA page about daily life in the International Space Station, the point is made that it is not just the contraption that is the problem:

Some crew members find the toilet difficult to get used to. As well as the device itself, they have to accustom themselves to the disconcerting fact that their bowels actually float inside their bodies - like the rest of their internal organs and of course everything else on board.

Is this a subtle way of suggesting that constipation is a problem in space? Yes, it appears that it is. A Google search brings a link to a book which comments:

Because the GI tract requires gravity assistance to function optimally, some astronauts suffer constipation which resolves in several days.

Apart from the always fascinating issue of space toilets, it did occur to me recently that we really don't see much on TV showing the interior of the ISS. It's usually just a short snippet on the news showing a bunch of astronauts greeting each other when there is a crew changeover.

In fact, the ESA website has some good pages of school educational material, and I particularly like this page with its videos of such interesting things such as an astronaut brushing his teeth, showing you the bathroom (including the toilet), getting some exercise, etc. It' s interesting to see the interior of the ISS is somewhat humanised by photos and other stuff that the astronauts have obviously brought with them. Well worth a look.