Phew, it's not just me. I have a big power strip running under my desk, complete with a big toe-sized on/off switch, lit by red LED. I compute barefoot whenever possible (feet on a cushion - bliss), and my toes tend to seek out interesting textures or places of warmth - like glowing red switches. While my upper-half is occupied with my PC, my treacherous feet conspire against me. Click. Arrgh. I suspect it's some form of evolutionary self-defence - my feet know that while my PC is alive, I won't walk anywhere, making them redundant.

Another aspect of this is the mind games I play with myself when I realise my toe is on the button.

"You won't hit it. That would be stupid, you're about to finish Star Control 2"
Click.