Guess my friend. 

---

> 
> A tail and mouths comprise me,  
> 
>  for shy I am  
> 
>  my hands fight continuously,  
> 
>  But give others jam.
> 
> 
> 

Hint

> 
>  Alone I am weak, with a friend I am powerful.  
> 
>  I do not create, but propagate.  
> 
>  Nowadays, they cut my tail and hands,  
> 
>  It does not bother me much as I can speak as much. 
> 
> 
>