More useful advice from Wiki How: How to Use a Bushman's Hanky.
Have you ever been out in public without a handkerchief (hanky)? This is how to use a bushman's hanky! (the Australian terminology for blowing your nose without a handkerchief)
Here's Step #3:
Choose left or right nostril. This may seem trivial but in the scheme of things it is critical. Making the right choice can depend on several factors. Risk of causing a public nuisance, risk of breaking the law, risk of shocking those that thought you were once a sophisticated and cultured individual. If the above concerns you, but you are determined to splay your snout-slime regardless, then choose the nostril with the most amount of mucous.
After clearing the first nostril there's a very big chance you'll be prevented at "going the tonk" on the other nostril because a. someone will attempt to make a citizen's arrest, b. you will be chastised by your friends and rebuked for doing the most disgusting thing imaginable.
