Wow...so Necromancy is pretty much useless to an adventurer in this Succubi infected world. Think about it, usually a necromancer would summon up a skeleton to attack another monster...but in this world, all that would result is you getting attacked by the skeleton girl you summoned AND the monster who was attacking you in the first place.
Well, I suppose it could be considered useful in a sense...
Skeleton
Species: Golem, Type: Undead
Habitat: Graveyards
Temperament: Simple, emotionless
Diet: Energy from human males
A creature created by a demon inhabiting human bones.
It looks like a species of undead. However, its flesh is created by the magic of the demon inhabiting the bones, making it either a type of bone golem or a bone dwelling ghost. Researchers are still divided as to which explanation is correct.
As with other types of undead, the memories and thoughts that the person had in life remain, but very often the sense of self and thinking abilities are very weak.
It acts on instinct when hungry, wandering and seeking the energy that it needs to sustain its temporary body. It will attack human males when it finds them and then use sexual intercourse to harvest energy from them.
They are not very strong (perhaps because they are made of bones), and it is possible to break them into pieces with a strong hit. However, no matter how much they fall apart, they will always recover and follow you anywhere, making them very troublesome.
However, they are meek when full of energy. Because they do not think well, they will leave the thinking to a male that they like and act in accordance with his orders.
Zombies and other types of undead cannot be born from male bodies. But since skeletons are a case of "magic creating the body" rather than "magic inhabiting a body," there are cases of male bones becoming monsters (an exception to the usual rule). In these cases, the male's memories and thoughts remain, but its thoughts are twisted so that it believes, for example, that "I was a woman in life" and "The man who was my best friend was my lover".
There is an art called necromancy, which is controlling the dead. It is extremely dangerous to use around monsters, in dungeons filled with magic and in the demon world. The necromancer would be attacked by the skeleton immediately after he tried to use a person's bones, since newly created skeletons are extremely hungry.