PLoS One 2010, 5, e14150. No 1 variable brings about sexual dependancy, but there are imagined to be organic, psychological, and social elements that lead to the advancement of these diseases. One of these horses manifests as a vengeful spirit and possesses him. 76. Impett, E.A. Strachman, A. Finkel, E.J. Gable, S.L. 75. Muise, A. Impett, E.A. Desmarais, S.