@vikorr,
All animals must relieve themselves after we eat and drink; some people purposely starve themselves, but most often animals want food to eat and water to drink. Otherwise, you starve to death, or die of dehydration. Having sexual relations can be consensual or rape.
Some health issues are beyond our control, and are greatly influenced by our genes and environment. Our lifestyle can also influence our general health.
A cut in our body can be accidental or by choice.
How you perceive free choice goes beyond eating, drinking, going to the toilet, getting cancer, or a cut in our body. There are different levels of any activity we choose to take.
It's about the decisions we make to pursue some goals or to just crap out and do nothing.
Your observation that Mary's pregnancy by god didn't take away her free will at any stage is wrong, and I disagree 100%.
Mary's pregnancy and a prisoner's life is comparing apples and prunes; there's no comparison to be made - except they are both food. Freedom and free will are somewhat related to some degree. If you live on a 2-mile wide island, your choices are limited on what you are "free" to do.
Unless you are guarded by somebody that forces you to do something 24/7, you still have some free will.