Because he couldn't get laid and needed to take out frustration on other men. It gave him sexual release.
Voldemort asked him to do so.
Severus Snape or Draco Malfoy
No, Severus Snape did.
Sixteen.
Yes! ---------- How did he? What were his attempts to do so??
Albus Dumbledore was killed by Severus Snape. Although Dumbledore, who was dying anyway, had already arranged for Snape to kill him so that Draco Malfoy wouldn't have to and so that the Elder wand would not change masters. However, as Draco disarmed Dumbledore shortly before his death that part of the plan did not work.
Yes. Dumbledore told Snape to kill him if Draco Malfoy was not able to so his death would be short and painless.
Albus Dumbledore was killed in Harry Potter and the Half-Blood Prince. He was killed by Severus Snape. The job originally fell upon Draco Malfoy, but he was unable to kill him.
This is a very broad question, and not worded correctly. Severus Snape killed Albus Dumbledore in the end of the sixth book. Dumbledore had asked Snape to kill him, to save Draco Malfoy's soul because of the Unbreakable Vow that Narcissa Malfoy made Snape take in the beginning of the sixth book since Voldemort had ordered Draco to kill Dumbledore.
Snape killed Dumbledore because: 1. Dumbledore was already dying. 2. Dumbledore asked Snape to kill him. 3. If Snape didn't kill Dumbledore, Draco would have had to and Dumbledore didn't want Draco's soul ripped apart on his behalf. 4. Snape made an Unbreakable Vow with Narcissa Malfoy that he would kill Dumbledore if Draco failed to do so. 5. It would land Snape firmly in Voldemort's good books so that Hogwarts would be under the control of Snape and not the Carrows. 6. If J.K. Rowling hadn't killed Dumbledore somehow, the final battle would be postponed for too long.
Dumbledore wanted Snape to kill him because otherwise Draco Malfoy would have had to do it, or be killed. neither of which Dumbledore wanted. Because he is already slowly dieing from the Horcrux ring that he put on his finger (the reason he has a black arm) and because Voldemort ordered Drako to kill Dumbledore and Dumbledore doesn't want it on Drako's conscience. Also, Snape needed to kill Dumbledore to silence any speculation with the Death Eaters about who's side he is really on. ------------------------------------------------------------------------------------------------ Dumbledore wanted Snape to kill him so that Draco's soul wouldn't be damaged, ripped apart on his acount. When Snape asked "what about my soul?" Dumbledore replied: do you think it would affect you by helping an old man avod pain and humiliation." or something like that.
Nobody.