What are the reasons for the alien “love bite” phenomenon described by Eve Lorgen where alien abductees report repeated interference with love relationships that undermine pre-existing marriages, or start an intense love relationship with a couple and then cause one person to lose their affection, leaving the other with painful feelings from unrequited love?

This is pure research. They wish to understand love in all its aspects, for they are not loving beings themselves. This is quite a mystery to them. They see its power. They see the great transformation that takes place when love is involved in human relationships and wish to understand this. So as with all things, they first tinker, manipulate, destroy, and then re-work the phenomena of interest, so they can control and produce it on demand. They themselves are incapable of love and feeling love. Whenever a human feels loved by an extraterrestrial, this is phony. It is merely the ability of the extraterrestrial to trigger feelings of love within the person. This they have learned from the experimentation we are discussing here with your question. They are simply producing feelings of being loved within their targets and this is a subterfuge and the humans involved are being duped totally. They are being manipulated to feel loved and it is that simple.