Since my 16-year-old son recenty received a cell phone as a gift, I've asked him to use it to call home if he's out past his curfew.

One Saturday night while waiting up for him, I dozed off in front of the TV. Later I woke to realize that there was no sign of him, and there had been no call.

Irate, I punched in his number. When he answered, I demanded, "Where are you, and why haven't you bothered to call?!"

"Dad," he sleepily replied, "I'm upstairs in bed. I've been home for an hour!"