Quick questions on classes re S12

[John M. Dlugosz]

1) How do you declare a private method?  I see how you call one, but not how to 
define one.

1b) Is the intent that $!foo without an explicit invocant refers to self, as 
opposed to $.bar or .bar which refers to $_ ?

2) re: has $brain;     # also declares $!brain;
Does that mean that $brain by itself refers to $self!brain ?



--John