It implies that the woman be on her back with her legs spread wide, people's eyes intent on her crotch, as if it's a big show she's putting on for them, and there's just something disturbing to me about that image. For me, birth is very internal and private. That said, I really don't understand what it is about the idea in itself of a vagina stretching and a baby coming out that turns the occasional man off sex. And is it then sex in general, or just sex with his wife, or sex with any woman who's given birth? The only thing that makes the remotest sense to me is if it's a traumatic birth or if the mother is cut... and then associating that trauma with her vagina, and not wanting to do anything that might mean having to experience that again. But just seeing the vagina stretch and a baby be born? I'm having a very hard time wrapping my mind around that, anyone have any insight?
It reminds me a little of this friend I had once who would never undress in front of her husband or let him see her without makeup. They'd both had previous partners in which this had been an issue -- they both felt that preserving some element of mystery or fantasy-illusion was crucial to his ability to become aroused.
I wasn't at all worried about my husband, he's not that way at all. But as it turned out there was never really occasion for him to stick his head down there. With my first the midwives were so involved with my vagina and so crowded around my crotch
that I doubt he could have gotten a good view even if he'd wanted, with my second it was a waterbirth and I was squatting, with my third he didn't know the baby was coming until she was out. He had the best chance probably with my fourth, as he caught the baby, but the light was dim and my vagina was facing downward, opposite direction from his face. But he did see lots of fluid and blood and poop, and he did see me screaming my head off.
No damage done to our sex life whatsoever.