Lyric discussion by decastro06 

Cover art for Anima lyrics by Sopor Aeternus

an·i·ma n.

  1. The inner self of an individual; the soul.
  2. In Jungian psychology: a. The unconscious or true inner self of an individual, as opposed to the persona, or outer aspect of the personality. b. The feminine inner personality, as present in the unconscious of the male. It is in contrast to the animus, which represents masculine characteristics.

the 2.b meaning is the answer. Anna Cantodea is a men with feminine soul.

It's a little sad hear she singing "I wish to cut my genitals and feed them to the dogs" but that's her feeling for herself body.