because they are dumb
I do not think there is much or any difference.
To wriggle is a verb and a wriggle is a noun.
"Move move" or "wriggle wriggle"
Well, it is a verb and a noun because there is two definition for wriggle.
I picked up the angry puppy as he tried to wriggle free.
Wriggle, wiggle, fidget, twist, worm, writhe...
The worm would not wriggle while the bird was there, but later it was able to move safely. He started to wriggle and later he managed to get himself freed from the ropes.
Pep Boys's motto is 'Parts, Service, and So Much More'.
still
NO I DON'T THINK SO BUT IT MAY START TO WRIGGLE
Worms are slimy and sometimes wriggle-y so naturally people would be scared of them.
You can wriggle rubber. And it will still have same size and shape.