Well they went through tubes.
I'm quite surprised.Out of all the Mario games out there (probably hundreds), none of them had anything to do with a plumber-related accessories.IE. There's no plunger, toilet cleaning kit... not even a toilet.
That's not what Mario is about anyway...<a href='http://www.aethiamud.org/communist_mario/' target='_blank'>http://www.aethiamud.org/communist_mario/</a>