Sure, honey, I'll go into the delivery room with you--if you want me never to be sexually attracted to you ever again.
That's the somewhat dire subtext--um, no, actually it's the text-- of Dr. Keith Ablow's column in The New York Times about how some men just might have real difficulty getting back in a sexual mindset vis a vis their wives after watching their children being born.
Oh, he throws out the possibility that pre-natal classes are too clinical, those cross-sectional diagrams might get in the way of a guy's erotic imagination, but let's face it; he's really talking about watching the kid come out.
Let's set aside the whole issue of what giving birth might do to the woman's own sense of her sexuality and attractiveness for a moment and compare sides. Apparently, women are expected to accept the multiple functions of a penis without any complaints or diagnosable hangups, but if it might be problematic someday, it's better for a man not to have to contemplate the multiple roles of a vagina?
Sounds like there's a legitimate problem here, but it doesn't have to do with childbirth.