Answer:
I am the ultimate killing machine used not once but TWICE I can be made by humans.
I do not contain flesh feather or scales; yet I have fingers and thumbs.
You get embarrassed when you stand on me when everybody is watching. Women don't like to talk about the number they see on me. Everyone stands on me when nobody is around
I go up when the rain comes down. What am I?
I have a title and many pages. I am a genteel of genteel descent. I am a killer veteran of war. I am a slave to my lord pledged to his service.
No matter how little or how much you use me, you change me every month.