Why is my female guinea pig acting strange?

First things first, check that she really is a female. There are good pictures at http://www.cavyspirit.com/sexing.htm If she is really a he, separate them at once! Assuming she really is a sow, you are looking at dominance behavior.

Sows will exhibit boar-like mating behavior, including mounting as a way to dominate a female cage mate.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.