Seat in Stand

Bernie and Eddie were fortunate enough to have a season ticket to watch Manchester United.  They could not help noticing that there was always a spare seat next (K37) to them and they had a friend who would love to buy a season ticket, especially if all three could have seats together.
One half-time Bernie went to the ticket office and asked if they could by buy the season ticket for K37.  The official said that unfortunately the ticket had been sold.  Nevertheless, week after week the seat was still empty.
Then on Boxing day, much to Bernie and Eddie's amazement the seat was taken for the first time that season.  Eddie could not resist asking the newcomer, 'Where have you been all season'.  Don't ask he said, the wife bought the season ticket back last summer, and kept it for a surprise Christmas present.