"Hey, who left the lights on?" said Keith nervously as he entered the shower room. He walked over to the soap dish, and grinned at the two bars of soap. "Haha, Chris, you idiot! You used Chad didn't you. Well, guess I don't have any witnesses now." Keith carefully wrapped the new bar of soap in cellophane. Then Keith stripped out of his clothing, as he prepared to shower with Chad.
Chris arrived a half hour later, he heard the shower running and grinned. He glanced at his watch 4:55 am. He had carefully arranged to reset all of Keith's clocks, his cell phone and computer to be an hour fast. Chad wouldn't be safe to use until 5 am. But Keith thought it was almost 6 am, not 5 am.
"Yo, soap boy, it's still before 5 am, your watch must be fast!" shouted Chris.
"What? Wait! You're not a bar of soap, but I thought you didn't believe me about 5 am!" shouted Keith with soap in his eyes. "What do you mean it's not 5 am? My watch says-"
"Yeah, you got an Apple Watch, and with Blue Tooth I changed the time zone for you. So it's an hour fast."
"But I- uh, who's the other bar of s-"
He vanished. There were two bars of soap in the dish.
Chris howled with laughter.