There are a couple of different theories about the origin of the actual name for the kissing gate. One possible origin has to do with the design itself. Since the gate mechanism is understood to kiss or touch the sides of the enclosure when in operation. A more fanciful idea has to do with a game associated with using the gate. Since only one person at a time can go through the mechanism, the first person emerging from the gate can effectively block the second person from proceeding. Usually, passage is granted upon the reception of a kiss. It is generally understood that this game only takes place between persons who are on friendly terms.