Where did "time flies when your having fun" come from? Time seems to move faster when you are actively doing something that envelopes your faculties, even if it

Where did "time flies when your having fun" come from? Time seems to move faster when you are actively doing something that envelopes your faculties, even if it has something to do with tracking time, like completing a complicated algorithm with a limited time to do it. Maybe you don't like general statements even if they are not implied to cover all cases?