I just realized something: A LOT of mamono would be dangerous to have as wives. Not because of any kind of hostile intent, but simply because of natural accidents and occurrences.
Example Scenario: A Lamia asks out a boy. He says yes. Natural reaction: boy gets snake-hugged out of pure joy on the Lamia's part. Consequence: Squish.Â
(I am reasonably sure that someone calculated the amount of crushing force a Lamia's tail could produce. Enough to reduce a crocodile to scaly chunks, I believe.)
Ignises, Ushi-Onis, Dragons, any kind of girl like a Lamia or Oomukade, etc.
All of them could accidentally kill you.
So...what possible countermeasures could be taken to prevent this, while still allowing cuddle time with your scaly/fur-covered/normal waifu?
(Demonic Energy only protects a couple during sex. So...unless you're planning on fucking forever, you're going to need to watch out.)