A disturbance in the regular elliptic or other motion of aheavenly body, produced by some force additional to that which causesits regular motion; as, the perturbations of the planets are causedby their attraction on each other. Newcomb.
The act of pleasuring oneself whilst anxious or unsettled.
When one masturbates to pornographic material that's extremely perturbing, raunchy, disgusting, or so obscurely erotic that it is hard to consider it porn.
Perturbation is NOT a synonym to [disturbation], which refers to the methodology of masturbation rather than the subject matter.