Much of my outdoor scatological activity is based on the revelations in this book

Like anything else it depends on the circumstances. If I'm way off trail in a dry environment I prefer the "frosting" method for reasons stated in the book.

Caution: Clicking on the link will reveal a naughty word. Don't be misled by the title, it's a serious book.
_________________________
If you only travel on sunny days you will never reach your destination.*

* May not apply at certain latitudes in Canada and elsewhere.