I don't have ocd,but my grandad did (I think it was a result of fighting in ww2)
He brought me up so this was perfectly normal when I was growing up
He went through some very strange phases-he would get up in the night to check he'd locked the door/all the plugs where off or I'd die
I would have to stand and lock the door (if we went out) as he'd be convinced he'd left the door wide open and we'd be burgled
If their was a food scare,we could never eat that food again or we'd be so ill,we'd both die on the spot
He went through a phase of wedging a long piece of wood between the front door/bottom of the stairs-he was convinced that if he didn't,the house would catch fire (we wouldn't have got out if there had been)
My parents couldn't have been less safety conscious if they tried-they still go by the train of thought 'it won't happen to us'
They have an old coal scuttle (that you access from outside) that is under the stairs
My father used to keep his motorbike there
My grandad became so frightened there would be a fire and we'd never get out,that my father bought a shed and stored his bike there
He also became so convinced that I'd get my foot/a scarf/my coat stuck in the motorbike wheel,he managed to wedge a bit of wood between the foot pedal and the wheel to stop it happening
He also bought me a pair of scissors and made them so blunt (and rounded the tips) they wouldn't even cut paper,but in his head I'd slice my own throat open if he just handed them to me
It's a very nasty illness