" So…” I pressed, rolling up on an elbow so I could look down at him. “Is it an undead thing? Like, you can’t father children because your sperm isn’t viable?”

One eyelid peeled open, revealing a sliver of blue. “I’m a vampire,” he deadpanned. “Don’t you read books? I can’t come inside unless I’m invited. "

― R.A. Steffan , The Last Vampire: Book One (The Last Vampire #1)