Because they are in awe of my handsomeness.
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 :)
Not all freshwater fish have permanently open mouths. In fact, very few of them do. But the reason they open their mouths so often is they have to do it to breathe. They suck in water and pass it over their gill fillaments (like our lungs) where Oxygen is taken in and Carbon dioxide etc is passed out.
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 a ferret does not clean people's mouths.
they open their mouths and eat.
No.
for food
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.