In a relationship, also have kids. Partner goes through multi-month periods where she's too tired and stressed out to have sex, doesn't really want to talk about it, and I got sick of having screaming arguments about it. Tried the whole making sure I was doing more housework, cleaning etc, to no avail. She's one of these people who is incapable of relaxing unfortunately.
Decide to give it a rest and just look elsewhere for sexual fulfilment when it's not on offer at home, and everything is working much better.
Am rapidly coming to the conclusion that a fulfilling sex life and raising a family don't mix very well, so happy enough to keep them separate for now.
According to the mumsnet crowd, my children would be better if I left them and spent my time fighting with my partner instead of working together with her to raise them, because wanting an active sex life, and not wanting to harrass my wife for it all the time makes me a terrible person.
I'm ok with that, though, because terrible people get threesomes with hot women instead of sitting at home by themselves in miserable celibacy.