"Aurelia," he began, his voice tinged with confusion, "if the XX virus is so important, why is it that Cassandra, who has it, only has a 2% compatibility with me, while Doctor Lyra, who doesn't have it, had a 78% compatibility?"
[My lord, compatibility indicates the likelihood of successfully engaging in an intimate encounter with someone. It reflects how attractive you are to a subject, hence the ease you'd have to having sexual intercourse with said subject. The XX virus, however, is crucial for ability copying and potency enhancement. High compatibility without the XX virus can facilitate other benefits, but it does not enable the acquisition of abilities.]
Zafron nodded slowly, trying to piece together this new information. 'So, I could potentially have a strong connection with someone, but without that virus, I can't copy their abilities? That seems... arbitrary.'
"Is there any way to increase compatibility with someone who has the XX virus?" he asked.