I had been wondering that myself
.....but on further reading it is quite simple.
It goes something like this:
Re-search thinks we should scatter our waste water ...(good idea)
Tormentil doesn't need to cos he's got a toilet ... (good to know)
Boddie doesn't have waste water ...(how come?)
Ron1863 lives in Scotland where it rains a lot (nevermind...rains good too!)
And there are lots of ill people in Scotland ... (allegedly!)
There you go ......quite logical really when you think about it
ps. not sure about the air pressure bit, I'll leave that to the clever people
