Soap on a rope

I was still in a nostalgic mood tonight and while taking a bath I recalled that 80's icon of cleanliness - soap on a rope.

Always one to ask the question "why" I tried to figure out who actually came up with the idea and compiled a short list of front runners.....

1. A paranoid male rugby player in a communal shower.
2. A paranoid male prisoner in a communal shower.
3. A pissed off mum who ended up wrapping the soap around the neck of their soiled sibling.
4. A compulsively clean suicide victim.
5. The owner of an extremely claustrophobic shower cubicle.