What they said they said was disturbing enough, but the totally unemotional nature of casually mentioning it to somebody makes it that much creepier.
I dated a girl once who had been wonderful to me for several weeks. We were both very happy until one day when she suddenly decided I should know that she had a demon inside her. Now, I consider myself an extremely down-to-earth guy, and I laughed in her face when she said that, but she was actually f_cking serious. She began "letting her demon take over" now that she was getting comfortable in the relationship and the one time we had sex after that she pretended she was transforming into the demon. The worst part of all? She told me suddenly that her demon had "cubs". And she kept trying to introduce me to them. I didn't last more than three days after that. By far the cringiest and most disturbing interaction I've had. (Source)