Once Bitten (1985 film)

Once Bitten is a 1985 American horror comedy film starring Lauren Hutton, Jim Carrey, and Karen Kopins. Carrey stars as Mark Kendall, an innocent and naive high school student who is seduced in a Hollywood, California, nightclub by a sultry blonde countess Hutton, who unknown to him, is really a centuriesold vampire. The film was Carreys seventh film and his first main role.

Meanwhile, high school student Mark Kendall wants to have sex, but is being put off by his girlfriend Robin Pierce. One night, Mark and his best friends Jamie and Russ go into a singles bar in Hollywood. Mark meets the Countess and he goes back to her mansion, and after she seduces him, he passes out when she bites his thigh. When he wakes up, she pretends they have had sex and tells him that he is now hers. Mark does not know what she means by that, and over the next few days, he begins showing strange behaviors having strange dreams, avoiding direct sunlight, and even drinking blood from raw meat. After the Countess gets a second bite, Robin notices Marks odd behavior and confronts the Countess during a danceoff at the high schools Halloween dance.While it appears that Robin has won back Mark, this is only temporary. The Countess kidnaps Robin to lure Mark to her mansion for a final bite before her deadline expires, and it is up to Robin, Jamie, and Russ to stop her. Eventually, to save Mark from the Countesss clutches, Robin and he have sex in a coffin while being chased by the Countesss minions, thereby taking Marks virginity, bringing him back to normal. This renders him useless to the Countess as she has to drink virgin blood. Defeated, the Countess then begins to grow old and decrepit before their eyes. The Countess assistant, Sebastian, tells her not to worry as there are other virgins in the world despite the fact that the Countess doubts she will find another virgin. The movie ends with Mark and Robin continuing to have sex in the coffin. ........

Source: Wikipedia