"Oh man," Jack pulled himself up onto the side of the pool, so that he could sit on the edge, his feet dangling in the water. He took the time to wipe his face with both hands. "I nearly slept longer," with a wide yawn, "Haven't got much sleep this..." he had to think for a moment before he looked over his shoulder and gave the girl a sideways grin that spread brightly across his face, "...last year?"
The master's program he had run through the last two years had been especially grueling in the last year, and since he'd just finished it, he was exhausted.
"Jack," a lot quicker and easier to remember than 'Jonathan.'