Thanks Saab for your reply. So if you were to cover this boys mouth from behind, which direction would your fingers point? How close to his nose might your hand come accidentally? His nose and mouth are a mere 1 cm apart.
Also, you say he may not notice the smell but if your hand smells like soap, he will. Why do you presume that he'd have no choice but to smell your hand? What part of your hand would be nearest his nostrils?
Is there a chance your hand may end up smelling like spit if he tries to scream for help against your hand? And why is he more likely to smell it if he were to move his head all around? What kind of contact might his nose make with your palm at times?
As you can see, I write alot and pay lots of attention to detail. Let's see what kind of info you can add. Thanks so much for responding:)