Chess Knight Move

Three men are sitting naked in the sauna. Suddenly there is a beeping sound. The first man presses his forearm and the beeping stops. The others look at him questioningly.
"That's my pager," he says. "I have a microchip under the skin of my arm."
A few minutes later a phone rings. The second man lifts his palm to his ear.
When he finishes he explains, "That's my mobile phone. I have a microchip in my hand."
The third man, feeling decidedly low-tech, steps out of the sauna. In a few minutes he returns with a piece of toilet paper extending from his rear.
The others raise their eyebrows.
"I'm getting a Fax," he explains