The message
from "Bob Mannix" contains these words:

Most women can learn to do the needful standing up, you know :-)

Slightly easier for the man to do the needful sitting down. I suspect views
on this are set by whether the person expressing the view cleans the toilet.

German males are generally required to urinate sitting, at least in
domestic premises.

However, a lot of younger females are quite practised at urinating
standing -- very useful in the great outdoors and at music festivals
etc.