Alligator Tears

Why does everyone call fake tears "crocodile tears"? Also, I always have to look up the difference between a crocodile and an alligator. They are both nopes in my book and I hope to never see either in the wild. 

Text:
H: Quit your crocodile tears!
A: I'm an alligator!

Fake Tears Pricing

 Basically the conversation my sister-in-law had with my daughter. Little one does not like anyone other than her parents holding her, some exceptions are granted for grandparents or cousins. Maybe for uncles and aunts if she doesn't realize they aren't her parents - you have to have plenty of distractions. Oh well, eventually she'll get over it. 

Text: 
S: Those tears are fake - I don't buy it.
L: I offer them for free.