In a situation where Pacman Syndrome is present the opposite sex is described as the "ghosts", and the individual as "Pacman".
Those in a relationship:
In the arcade game Pacman is chased by the ghosts, and tries to stay away from them. This represents that the individual is pursued by the opposite sex while in a relationship, and attempts to keep away, in order to avoid being unfaithful.
Once Pacman eats a power-pellet (representative of a break-up), he can then pursue the ghosts. This represents that after a break-up, the individual then switches, and begins to pursue the opposite sex, who in turn, try to keep away from the individual.
"I know... its Pacman Syndrome."