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A long, long time ago, someone asked that very question while sitting in a bait shop eating pizza. Of course there were no computers at the time so the question was about posting personal adds on the local notice board. The consensus was that it was a good idea but the fish monger, who managed the board, was against it. Try as they may the supporters could not convince them to change their mind. Eventually they gave up and decided to find another location for the personal adds. Looking down at the pizza box in front of them they had an idea. Why not put personal adds on the tops of peoples shoes. Then as they shuffled around town looking down as to not make eye contact with others, they would see the personal add. Of course this practice of not looking people in the eye made the need for a space for personal adds all the more urgent. The next problem was how to decide who's shoes you would attach your add to and how to do it without sneaking into their homes at night. A young delivery clerk reached into their mouth and pulled out a very tired piece of bubble gum he had been chewing to the point it was devoid of flavour and use, except for the fact it was still very sticky. "We could put the notice on the ground and place some gum on it so when someone steps on them both, the notice will become attached to that persons shoe". Immediately the crowd moaned that you wouldn't be able to tell who would be the recipient of someones plea for love. The wanted to know how this could be resolved, to which the young clerk responded, "You can hire a gumshoe".