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Crocodiles are often seen on the beach, looking like they are asleep, with their mouths open. What they are doing is basking, they keep their mouths open to regulate their body temperature. People sweat, dogs and cats pant, and crocodiles open their mouths :)
Because they are in awe of my handsomeness.
they open their mouths and drop it in, no chewing, just a swallow
Some People do open mouth
to eat, or to sing, or to vomit into the mouths of their children
eels must open and cloth their mouths constantly in order to circulate water over their gills
Typically, when Americans open their mouths English comes out; this happens somewhat less with French people.
No.
for food
they open their mouths and eat.
Many fish swim with their mouths open. They swim with their mouths open because the water goes into their mouths and out their gills, which is how they breathe.
they open their mouths to suck in food.