Based on the title (which translates to "Vampires F***ing at Half Past Twelve"), this appears to be a reference to a specific short animated adult film or cult niche content.

Frau Wirtin - Vampire ficken um halb eins (Video 1986) - IMDb

Over the years, vampires have undergone significant transformations, reflecting changing societal values and cultural norms. From the monstrous, bloodthirsty creatures of early cinema to the brooding, romantic anti-heroes of modern fiction, vampires have evolved to captivate audiences in new and innovative ways.

In the shadows of a secluded alcove, the pretense of "civilized" behavior faded. There was no need for small talk between two hunters of the night. The air between them crackled with a centuries-old intensity. They stood inches apart, the heightening of their supernatural senses making every sound—the distant bass, the heartbeat of the crowd—resonate like a physical weight.

While the earliest known usage of the phrase is as the title of a German animated pornographic short film produced by Amor Film (alternatively spelled Armor Film), the phrase gained a wider, albeit still niche, notoriety as a song by the German artist Lasy. Both the film and the song use the title as a blunt, humorous hook to describe a surreal, inconvenient, and noisy scenario.

The encounter was unexpected. Der Graf, standing atop a platform, surveying his kingdom, locked eyes with Lena. There was an undeniable spark, a connection that seemed to transcend the ordinary. He descended from his perch, his movements fluid and predatory, and approached her.

While visually crude and intentionally offensive by modern standards, Vampire Ficken Um Halb Eins remains an interesting, niche historical artifact of 1970s West German adult animation, showcasing a bygone era of radical, unpolished underground counterculture.