Elf has now been added to the game, there's still a little bit of work to do on her visit/reside requirements but she's playable and I'll be releasing an early access version for Gold+ members in a day or two. Here's her encyclopaedia entry.
Virginity will be added in this version. Monsters whose total sexual record (excluding masturbations) are zero are considered virgins. In the future a corruption alternative will be added, these will both have an effect on magic attacks. Less corruption powering up light type attacks, while higher corruption would power up dark type attacks.