I hadn't realised, until I woke up in the middle of the night, that I had been affected by this thread (watched the first series and that was enough for me ;) ). My house is more Miss Havishams (from Great Expectations) than How Clean, but there is a very good explanation for this.
Over 30 years ago, until I had baby no 3, I was bumbling along, quite happily, 2 little ones, working part time, keeping the house clean, polished, etc etc etcetc etc. Then No 1 son started school - and daughter started playgroup - school being 2 miles away, playgroup a little further down the road - as I was expecting no 3 - so I gave up work. This was in the days when we all walked everywhere, remember ;) When baby 3 was about 3 weeks old, by which time I had got into quite a good routine, breastfeeding, walking to school & playgroup, stopping at a friend's house to breastfeed again, picking up daughter from playgroup, home, lunch, clean up, breastfeed again, walk to school to pick up No 1 son, home, tea for children, play with them, etc etc etc..... until I opened a cupboard one afternoon and found - a mouse!

!
This really freaked me out, and overnight, I became absolutely fanatical about cleaning - I was up a 4.30 in the morning, scrubbing every kitchen cupboard out, bleaching shelves, wiping every tin with a bleach solution, spent a fortune on Tupperware, so that everything in packages was in plastic, which again, I wiped with a bleach solution every day. I washed bedlinen every day (and although I had an automatic washing machine (very modern in those days) I still had to hang it all out to dry - so as well as baby & small children washing (remember, cloth nappies as well) I really added to my load! Plus I hoovered everytime we were going into a room, and every time we were going out. I SCRUBBED the pram - again bleach solution - every time I put baby in it - and took him out - including scrubbing wheels & spokes - this was a big Silver Cross coach-built pram - and as for poor old Simba - lab of the day - he wasn't allowed in the house until I'd dipped his paws in a bucket of warm water with disinfectant in (no, not bleach this time ;) ).
Have you seen The Last of the Summer Wine, when Thora Hird would put paper down for her husband to walk on? Well, I was doing that as well

I had no time to play with the children - I was too busy bleaching all their toys - the whole house smelled like a Swimming Pool.
This meant I was up in the morning at 4.30, not getting to bed until about 12 midnight, when I'd do the last feed - and I would be vacuuming then, before going to bed.
OH became aware of all of this, eventually (you know how long it can take, before the penny drops with some men ;) ) when our neighbour asked him, very casually, if I was finding it heavy going having the 3rd baby, because they could hear me hoovering so late at night. His remedy (bless) - was to take the hoover to work !!!! and promise that he would hoover, every day, when he got home - he said, quite rightly, it only needs doing once a day. He also took me to the doctors, because my hands were becoming quite sore and inflamed, through the use of so much bleach! We had a lovely doctor, who talked to me for ages, and managed, somehow, to convince me that 1 little mouse wasn't going to be the death of us all, and that I was putting the family at more risk with my use of bleach etc etc etc.
Friends, who'd been worried about me, but who hadn't known what to do about it, suddenly started coming round and taking me - and kids - out - to messy homes!!! What I didn't know then, and didn't know for several years, was that they DELIBERATELY left the kitchen/lounge messy when we were coming round, so that I could see that it was "OK" to do so. So, gradually, I overcame this compulsion, which was obviously a type of post-natal depression, and decided that if there was a choice between HouseProud Shrew and Happy Slut, then Happy Slut it was to be!
When I returned to college, some years later, and worked with families at risk, I realised that there was a problem in perception - very rarely on television, in any programme, would you see a kitcehn in the normal disarray of breakfast etc - you wouldn't see a pile of laundry, waiting to be ironed, et etc. This can become a problem for "perfectionists", who then see themselves as total failure, if there is as much as a cornflake packet left out - so defeatism takes over, all too easily.
Phew - now that's out - and maybe I'll sleep properly again tonight - fancy a post like this, bringing it all back to the surface, all these years later!
Margot