Physiologically, the process of procreation is all "out of our control", whether on the side of men or women.
For example, women don't have a choice of deciding whether to get pregnant or not (think about rape or adultery) they don't have a kind of a built-in curtain they can voluntary open or close and men also little control over ejaculation, it is not voluntary as spit for example.
I would expect from the Creator, that the Man would be different from animals on this subject, and just as we have control over our muscles - how we move, or our eyes - what we see, we should have full control over how we reproduce. I would still leave G-d the power of fertilization, though.
That would also simplify a lot of things in life. Just imagine - no pregnancy hassle.
What is the reason (according to Judaism) that the human reproductive systems are non-voluntary?