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I took the liberty of reading some of Mr. Duncan's other work- and it looks good. After reading it, I believe he's sincerely pro-choice, and trying to work his way through an extremely difficult topic.
His use of "male" to mean "expressing forceful opinions"? Weak, especially given his friendship with feminists, but I'm sure he'll have his consciousness raised eventually. Hopefully they'll also address why having a child at a pro-choice event isn't a "Contradiction", even if it's terrible parenting to have a toddler up past 11.
Where he leaves the rails, as far as I'm concerned, is in his use of an extraordinarily rare event as a jumping off point for the question of the role, if any, for men in the political and personal abortion debates. I drove my college classmates to get abortions (2), and gave birth control/sexual health seminars to every dorm on my campus over 3 years, and I have NEVER heard of an abortion party.
It's his experience, he's entitled to write about it, but I'm hard pressed to think of a context less likely to result in a thoughtful discussion on abortion, save a Kansas tent revival.