Whistles aren't clean, they're full of spit
The people in Dubai don't watch the Flintstones but the people in Abu Dhabidoooo!
Gordan Ramses
When her moustache is on fire!
Spit, Swallow and Gargle.
Because dogs can't whistle. (X-post from r/dadjokes)
So they don't whistle on the way down.