Did you know acrotomophilia -- from the Greek akron [extremity], tomein [to cut] and philein [to love] – was a condition in which a person is sexually aroused by the sight of an amputation?
The amputation usually involves of a whole arm or leg.
This isn't to be confused with apotemnophilia, which is a neurological disorder in which otherwise sane and rational individuals express a strong and specific desire for the amputation of a healthy limb or limbs.
When experienced very strongly, some people with apotemnophilia can feel discontented with their bodies and want to actually remove an otherwise healthy limb, a condition called body integrity identity disorder.
Apotemnophilia should not be confused with acrotomophilia, which is the erotic interest in people who actually are amputees.
For further study, there's a feature film concerning amputee fetishism: Boxing Helena.
It's directed by Jennifer Chambers Lynch, daughter of David Lynch.
Now you know.