My own opinion is that they are at least part vampire and can't see their own reflection. But rather perhaps the reflection of their own internal narrative.
Mine went on a rant once about how loyal she was and how supportive of those in need - This while the weight was falling off of me like water while she gloried in the excitement of her secret affair and how she was "getting away with it" with the support of so many of her friends (most of whom have abandoned her now).
She also complained about her own rapid weight loss due to not having an appetite due to depression. While eating an extra large double-scoop ice cream cone in a waffle sugar cone.
You can't make this stuff up.
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells