Mark Kendall just found out his one-night stand has been around for centuries.

Once Bitten (1985)

Directed by Howard Storm

Mark wants to lose his virginity, but his girlfriend wants to wait. Unfortunately for both of them, a 400-year-old vampire Countess needs to turn a virgin into a vampire before Halloween in order to preserve her own youthful appearance, and when she finds Mark, she turns his life upside-down.