Perturbation

[Sarah]

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.

[Sarah]

The act of pleasuring oneself whilst anxious or unsettled.

[Sarah]

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.

[Kai]

A [deviation] in the state or [complex] motion of a system, moving object or massive body - caused by outside [influences] or third parties.

[Ernesto]

Anxiety; mental uneasiness.