It has long been the view of the Observer blog that mouse clicking is responsible for a significant increase in stress levels at work. Especially when your connection slows down. This is because you come to feel the mouse as an extension of your hand and want the interface on screen to respond with the speed of your own motor neurone impulses. You click on something and expect it to react at the speed of thought. Then you get disproportionately wound up when it doesn't happen. It is an mini-sensation like one of those trying-to-run-away-from-scary-monster-but-can't-move nightmares.
Now experience mouse interaction without clicking.
Clicking not allowed.
Spooky at first. (Via next door.)