It had been a long day and David was tired and cold as he waited for the bus that would take him home from the centre of the city where he worked. The bus, as ever, was late. The street on which he stood was dark and a biting wind was blowing, a wind that went straight through his thin shirt and caused his nipples to protrude painfully.

Normally he was used to having this time to himself, no one bothered with buses at this time of the evening so he was usually alone standing at the bus shelter. He was therefore surprised when he heard footsteps walking towards him...