I do not think that this is a good idea but:

The module (with a stupid name for my purposes):

package _424188;
require Exporter;

our @ISA = qw[ Exporter ];
our @EXPORT = qw[ the_mascot ];

my $data = { ANIMAL => "camel" };

sub the_mascot {
    print<<"END";
Hey, did you know that Perl\'s mascot is a:

$data->{ANIMAL}

END

}

sub new {
    my $class = shift;
    return bless $data, $class;
}

sub animal {
    my $self = shift;
    $self->{ANIMAL} = $_[0];
}

sub mascot {
         the_mascot();
}

1;
[download]

And a program that uses it:

#! perl -slw
use strict;
use _424188;

the_mascot();

my $obj = new _424188;
$obj->mascot;
$obj->animal( 'dromadary' );
$obj->mascot;
the_mascot();

__END__
P:\test>424188
Hey, did you know that Perl's mascot is a:

camel


Hey, did you know that Perl's mascot is a:

camel


Hey, did you know that Perl's mascot is a:

dromadary


Hey, did you know that Perl's mascot is a:

dromadary
[download]