Bite Neck

In The Sims 2, Bite Neck is an interaction available only to Vampires, that transfers Vampirism to a Sim who is not a vampire already. To successfully use the bite-neck interaction, the vampire must have a good relationship level with the Sim they wish to turn. This relationship varies. The vampire performs some measure of hypnosis involving "purple smoke". The Sim being targeted expresses a dazed smile, and when they are bitten show no form of pain. This could be a result of the hypnosis, or that it doesn't actually hurt. After this, the vampire Sim will let go of their victim and step back. The bitten Sim will jump into the air as more purple smoke rises from beneath them, and then travels up into their body, at which point the bitten Sim has become a vampire and lands on their feet to share a friendly "Bleh" with their sire.

''Note that sometimes, a Sim might reject the bite, but once your Sim is a vampire, he or she must be at home asleep when it is daylight or his or her motives will drop and he or she will die. It is best to bite someone's neck at night.''