From a man's point of view, sorry, but I don't know why your husbands aren't interested.. can't quite relate to that. I guess it could be medical? It surely can't be that they're watching 'stuff' on the Internet instead.. who wouldn't want the real thing, at least once in a while?
I'm coming at this from the other side.. I was looking for a topic where it was the intimacy from the women that was lacking; which is what's happening in our relationship.
We've been in separate beds for a few years; that started when we had kids, and it became easier to have her get up with them (stay at home mum) and me being a bit more rested for work. Breastfeeding them didn't help with our intimacy either.. the last thing she wanted after having the child on her boobs, was for me to get anywhere near them!
I can understand all that, but we maybe have sex every 3-4 months, which just isn't enough for me. We have a good relationship together, talk about the kids, laugh & watch TV together, really love our 2 kids, manage a kiss or two (on the lips, but nothing passionate) each day.
We've just started trying to sleep in the same bed again (snoring makes it difficult) so I'm hoping that might help things. But the kids are still up at 6am each morning, so by the time we're in bed, she's knackard & doesn't want me climbing all over her ;)