In the same way that a woman wanting to use prophylaxis with her partner becomes grounds for abuse because it means that they're "giving it away" to other men. I'm not sure how else to communicate the context of the country we love in and how we arrive at things.
For the silly ducks that cannot understand what she means by misogynistic weapon, much like infidelity, men will accuse women of having "given them" another man's child, without any evidence, as a thing to use as an excuse for abuse.