Pruni, is this a spoof thread? In case it's not I'll tell you what I think anyway: SAHMS are not necessarily less frazzled and knackered than WOHMs and WOHMs are not necessarily more frazzled and knackered than SAHMs, I don't tihnk it's possible to make such sweeping generalisiations because how knackered and frazzled a person is is dependent on so many things - how many children you have, whether they sleep, ever, how much money you have, your health, how much sleep you get, how happy you are, whether you like what you're doing (SAHMs and WOHMs), how healthily you eat, your relationship or lack of and how happy it makes you, your friendships and support network. And I could go on but you get the idea. I'd say there's no correlation between good/bad sex life and sah/woh tbh - countless surveys would like to prove causation and correlate all sorts of unrelated things but statistics and real life are far more complicated than that. I've been happy with my sex life as a sah and a woh but it had nothing to do with being one or the other and everything to do with all the other factors mentioned above and with my relationship.
Also, I think you'll find some SAHMs resent the implication that their job is easier than that of a wohm! It's not an issue in our house simply because we both agree working outside the home is easier in our case and we both find being a sah more stressful and harder work than working outside the home. But that won't be the case for everyone, different things stress different people.
I work part time and i look forward to working days as they are my break and my respite.
I am far less knackered after a days work (which is an actie job not just sat behind a desk all day), than i am on an active day scrubbing the house, rushing to get shopping, playing with dd and the list goes on ....
I think thats the thing isn't it. A job you get done. A day at home with the children and the household chores you can go on and on ... and forget to go and have your 15min tea break and your hours lunch!