This Toe Mouse is designed for people with upper-limb disabilities who find using a normal computer difficult. To use it, you simply stick your first two toes on it and use it like a normal mouse, clicking and pointing around on a floor-based mousepad.
And you know what? I'll bet this doesn't take all that long to get used to. And even people who are fully capable of using a normal mouse might find it helpful, as you'd never have to take your hands off the keyboard to use the mouse with this thing. Of course, you'd need to be barefoot, which could get awkward at the office. But that's a small price to pay for surprising the hell out of people by scrolling around on your computer without using your hands.