MIL would be able to tell you exactly how many minutes DBIL spent in the shower this morning, bless him.
The TV volume has to be on at a set number (which I believe is 33), they can't bear the little light on the sky box to be going around, when you turn the TV off you have to press SKY so it stops, I assume otherwise it will blow up while they're in bed.
They are also obsessed with turning everything off at the plug, they used to look after our dog when we went away, we'd come back to find everything in the kitchen unplugged and all the sockets turned off, one time this included the pump for the fish tank
.
If the phone goes and theres no one there, or it's an off shore call centre and they can't understand the call, they will tell you about it the next three times you visit.
Two weeks before they go on holiday the suitcases will be out on the "front room" floor, she washes, dries and irons everything and puts it away as it's done, when they get back from holiday their "holiday Clothes" go away unwashed, and the cycle begins again, I find this very odd, but then again I don't have a complete "holiday only" set of clothes.
She takes enough "pants" for 2 weeks, but washes the same pair every night in the bathroom sink, dries it on the balcony/radiator and wears it again the next day, the same pair for 2 weeks.
MIL doesn't allow drinks or food upstairs and finds it most strange that I do, we've been known to eat a curry in bed :)