I intend to disprove or at least damage the ladder theory

[Helm]

If you want, I can help you. Seeing how it's full of holes as a theory, I mean. From first glance, I can see a number of psychological neuroses or fixations which could lead a man or woman to having intercourse or even a stable relationship with someone not very high on their ladder (passive agressive manifestation, masochistim etc). So psychological and/or even physiological health obviously is an unlisted issue which you could exploit to an unlimited length (by showing how one's chemical state is never normalised so how can a generic mode of psychological normality even be employed so on so forth)

but if you're doing this because of some romantic sentiment you may have, then I'm not sure I care to help.