Turn-off

Turn-offs are things or events that decrease a person's [...] arousal. These can either be observed by the person during, or more often, before the [...] act, or suddenly enter the person's thoughts. Hence, turn-offs May Be either physical or psychological in origin. The term is intended to be the opposite of "turn on".

Examples of typical turn-offs:

Financial or personal problems such as debt or mental illness
Stress
Performing taboo activities
Sudden discovery of body hair (either due to hirsutism or lack of shaving)
Speech disorders (eg. Stammering)
Physical imperfections (eg. birthmarks)
Piercings and/or tattoos
Body odor
Body weight (either overweight or underweight)

Turn-offs are not same for all persons. For example, while someone will lose all [...] desire as soon as he discovers that his partner has a birthmark or excessive hair growth on her/his body, someone might be apathetic or find it to be a turn on.

Additionally, turn-offs are not necessarily attributes of the person being observed. People may turn themselves off if they consider their own attributes to be sexually unappealing.

See also

Impotence