I think the author would say...
RE your first flaw
Men put everyone on a single ladder, but will fuck the person closest to the top
that is immediately available to them. I may have
Tina Yuzuki at the top of my ladder, but unfortunately she is not immediately available so I will choose the next person down.
For the second flaw
Men are placed on her ladder based upon attraction, which includes a whole pie chart of things. As soon as sex has finished, the whole pie chart adjusts as novelty is reduced and other information becomes known.
I would say that novelty scores pretty high on the man's ladder as well. Faced with re-fucking a Tina for the third time, or
Sora for the first time, I would pick Sora.