Ristretto, which is made using very little water compared to your American version of coffee, can indeed have a dehydrating effect - but it’s often served alongside a glass of water; at least in Europe.

I do not have IBS but I still get bloated from drinking sparkling water (although this depends on the amount of carbon dioxide added during carbonation), so I tend to shun it most of the time.

The whole topic of washing your hands is missing from this post. Of course you have to wash them after using the toilet, but you also need to wash them before sitting down to eat (especially fingerfood), and it’s advisable to wash them whenever you get home from somewhere, plus before and during food preparation,…