I'd like to open your minds to the very dangerous and unique world of demons. I guess this is to give you an option to believe or not.
Though succubi and inccubi sound totally different they aren't. Succubi are females and Inccubi are males, but they are both same because this demon can swap between Inccubi and Succubi. Succubi cant reproduce, as in children, so they'll enter mens dreams and have intercourse, later on becoming an Inccubi the same thing will happen entering a girls dreams, but because of having the reproductive cels from the female, they can produce sex cells, and can impregnate a girl, i.e - making a very dangerous human being.
They are often summond because they are safer than normal demons...
But what happens if it goes wrong, there is a spell online that you can find to get rid of this demon....
All this info in more details -
http://yahoo.answers.com/what are succubi and inccubi?
Vampires
These are very dangerous creatures, they are immortal blood drinkers. Mainly appearing only at night there appearance can be mistaken...
Some types of vampires are extrordanarily beautiful, and this is what they use to lure prey.
But there are other types from old folk legends that are described as a dead person i.e - a zombie.
Anouther one is a phantom like vampire, although we do not believe it is actually a vampire it falls into the catorgary.
This type of vampire i have a lot of knowledge of having dealt with one of these myself.
It has a cold presence, which can make you very ill in a matter of hours, it prefers to drain your energy and torment you til you die. In folk lengends it is known as the ekimmu, i can go into more detail, but it will take too long to write out, ok so thanks for being interested, and i hope i have enlightened you.
Next issue of believing the impossible - the origin of the dog...