:o Aha I knew it was'nt just me!
Enviroment is a part of it but money, stupidly sensitive skin and getting a bit wheezy when using cleaning stuff kiced it off and saving money is an issue too as we are a bit on the skint side at the mo and things like that can be cut back on, for us anyway.
To be fair to him he does do some cleaning at the weekends, he washes the kitchen/bathroom floors and if I'm having a lay in the kitchen surfaces and bathroom... although why he does the surfaces in the morning I don't know they get done at night and as far as I know I don't cook in my sleep
:o
I only wash my windows 3/4 times a year as if I can get away with basics I will... but generally I wait until the sky always seems to look cloudy when you look out them 
I was a bit miffed about the seperating too, yes apparently it is manky to put pants in with bedding etc... I assume he does not think there is an issue sleeping in his boxers and contaminating the sheets then?!
Soap nuts are fab! I have only been using them for about 2 months and have managed to convert my clean freak mother and gran to using them which I was gobsmacked by as my mum is the type to have a hoover for her shoes and clothes (sadly that is true
but still it's an achievement :o
You basically buy a bag of them, and you get a big bag of sticky nut shells, take 4 out, halve them and chuck in a little mesh bag in the machine with washingand those halves get changed every 4 days. So really it is laziness because I don't even need to measure soap powder :o
Washing smells of nothing (which is fine by me) and is soo soft but you can add essential oils if you want a wiff about them. Sorry have gotten a bit attached to my nuts 