3. WHAT ARE YOU ALLOWED TO DO TO DEFEND YOURSELF AGAINST A PERSON USING YOUR BODY WITHOUT YOUR PERMISSION?
(Note: this question does not apply to pregnancies with less than 23-27 weeks of gestation due to the First Question's conclusion.)
You are allowed to stop them, and you are allowed to ask for help to stop them. Three caveats:
Are you allowed to murder a person using your body without your permission? No.
If the person using your body without your permission is threatening your life, are you allowed to kill them in self-defense? Yes. As a last resort, killing in self-defense is not murder.
In the case when a person is using your body without your permission but not threatening your life, what are you allowed to do? You may separate that person from your body, and you may request medical assistance to help make the separation as safe as possible for both you and the person using your body without permission. If that person passes away after being separated from your body because their body is not able to sustain itself, it is important to note that this death is as natural and fair as death can be. The most natural death is the death a person faces when their body is unable to sustain itself. We often think about natural death occurring at old age, but natural death from the body's inability to sustain itself can happen at any age—that's why young people still die every day from heart attacks, lung failure, kidney failure, liver failure, muscle dystrophy, cancer, etcetera. Natural death is not murder.