I actually read the full thread, unusually for me.
I'm always a bit torn on this issue (except when there's abuse, coercion etc, of course). On the one hand, of course nobody is ever obliged to have sex. Your body is yours and if you don't want to then of course you don't have to. And I definitely understand why your libido would take a hit when you're looking after small children, breastfeeding, shattered, broken sleep and all the rest of it. Any decent human should be understanding of that. And I see the OP's point that date nights etc are no fun when the only purpose is to have sex and your partner would happily do without your company and conversation and sees them only as means to a single end.
On the other, I do also understand that constant rejection and indifference towards one's needs for sex and intimacy are hurtful and distancing. If my husband didn't want sex with me, and didn't want to know how this made me feel, I'd certainly be questioning our relationship. Partly because I do have sexual needs and partly because someone who loves me is supposed to care how I feel and not be happy to wave me off without a second glance.
If I were the husband, I like to think I'd be prepared to help out with night feeds etc (expressed or formula milk) so my partner could get some rest, some time to herself and not be so touched out all the time, and accept that I won't be getting sex as often as I'd like, and that affectionate touching can be complete on its own. I also like to think I would find some way of talking about it without raising my voice or telling my wife that she's the problem and needs to be fixed with therapy etc. That's horrible.
If I were the wife, I like to think I could try to reassure my husband that I do love and fancy him (assuming I did, of course) and the problem was not personal, but simply that I have too many demands on my energy and time...and perhaps discuss some way of reducing those demands so I feel not just more inclined towards sex, but more appreciated and supported as a person.
So I'm not without sympathy to some of the sentiments expressed by some of the dudes here, and some have of course expressed them sensitively. But with that said...
Perseus, shut up. Shut up with your condescending lists of dictations to the OP, which ironically include an order to speak to her husband in a nice sweet manner that won't get his back up. And fuck right off with your order to her to stop breastfeeding. What a nob.
Whichever prick it was who mansplained feminism to us, you shut the fuck up too. Twat.
typicalbloke, I understand why you're narked by your reception. As you said, it was a Man's Opinion you bestowed upon us, and therefore should ended the debate there and then. But what can I say? Despite its sanctity as a Man's Opinion, it still came over like the ramblings of a self aggrandising, pompous bunglecunt, and so that's how people are generally going to react to you. But as this was exactly "as you feared" and enabled you to "rest your case", I wonder why you attempted to cast your pearls among us swine to start with?
And as for marathonmiker, well actually I want to thank you. I had a very tough night with the baby and I didn't think anything could make me laugh today. Then I saw your list of spiteful PUA advice and I cracked up, because nothing is funnier than a pillock on Mumsnet who thinks he's a suave ladykiller attracting women like flies to shit.
Best of luck to OP and her husband. If they love each other, I am sure they will find a way.