Apotemnophilia
For your knowledge, it's the tendency of some bizarre people who want to get rid of their legs or arms so badly and would do anything or everything in order to achieve their obsession. For example, after being rejected by several surgeons who refused to do the amputation for his/ her healthy limbs, one might probably lay on the railway track and when he awoke he will be an amputee. Note, the amputation is not necessary! They simply want their legs or fingers or watsover to be removed! siao
and some might reach their orgasm and highly arousal seeing the amputees!!! if you're interested too, click to see this & get high! 
Sherlyn Tan, Vivian Loh, Christine Wv & Sue Jean , my poor Microsoft Word has expired therefore without any appropriate medium to do my part of Psychology literature review, i think it's the best to post it here :D come have a look, see if my points are corresponding with yours!
The phenomenon of people amputating healthy limbs is not as rare as one might think. Despite those who actually referred to psychotherapists or medical aid for this seemingly abnormal obsession, there are a large number of amputee wannabes that is enough to support a minor industry on the internet. Knowing that there are people having unusual desire like them in the world, they reveal their dark secret, share their amputees photography collection and gather to discuss the ways to get rid of their limbs. It might sound absolutely hilarious and ridiculous that why would anyone want their leg or arm cut off? Where does this immensely weird desire come from? However, there are no precise etiology that can be concluded from all the researches and reports done.
One significant determinant is the early childhood experience and familial interpersonal relationships of a amputee wannabe. Most of the cases shown that the patients had had unpleasant childhoods and since then their desire towards self amputation had firmly established. They were ignored by their parents and rarely have chance to communicate with anyone about their amputee fetishism. For instance, a patient born with clubbed foot was always yelled and criticized by his father upon his walking disability. Nevertheless after the condition was surgically fixed, he did not receive any positive reinforcement from his father. The ruined father-son relationship made him felt that he was not the one wanted in the family and began to develop the thoughts of leg amputation. Some patients whom suffered from deprivation of family love might think that through amputation and receiving handicapped status, they could draw the attention and sympathy from people. To be precise, their initial intention was to seek love and concern from their loved ones.
It is rather bizarre to say that the fetish of becoming an amputee is inseparably connected to the term "achievement". For the amputee wannabes, if their attempts to lose their legs or arms have (finally) succeeded, the outcomes are gratifying and they are very much satisfied. They have the desirable obsession to live as a handicap but strike to achieve beyond a handicap could do. Self-amputation seems to be categorized as an "achievement" that is unusual for normal people and by being able to achieve it, the amputee wannabes will feel highly erotic. According to them, "Even without a hand or a feet, i still can do it!" It was the satisfaction of coping heroically. They were courage and passionate to do things that one would say is unexpected.
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然后我开始憎恨自己
难道加油 是我仅能说的吗?
很多时候,除了加油。真的还是加油!
每个人都在遗憾年轻的生命提早枯萎,或许他在另一个地方有自己的天堂。祝福他,是我们仅能做的。