Quirkette, this is a Tolkien discussion forum and, whether it makes you comfortable or not, it is an issue which deserves to be discussed. I would not say that this is overly 'casual'.
Encaitare, you realised why I had to use the shocked smiley.
I wasn't being altogether serious about that point, don't worry.
As has already been pointed out, just because Eowyn was skilled with a blade does not mean that she could overpower Grima if he attacked her. This is not evidence against the proposition
Grima could rape Eowyn.