Should men have an opinion?

Dani • I'm so much cooler online.
About abortions and pregnancies and whether or not a woman uses painkillers during labor, it just never made sense to me how men could possibly have an opinion. They don't have to shit out a kid. How could they know enough to have an opinion.
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In my opinion, men aren't entitled to an opinion about these things.
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And I know it's an awful thing to say someone isn't entitled to an opinion, but it's also kind of awful for a man to try and dictate what a woman does with her uterus. 
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Anyway, I was just wondering what you ladies thought. 
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Please be respectful. I'm aware that lots of you wont agree. And that's totally fine. 
Thank you! 
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EDIT
A lot of you think I meant the father. Of course the father has a say. I'm talking about men on social media who argue about this stuff in a generalized way. Not about their partners and unborn children of course.