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Behavior methods are automatically available on any model acting as the behavior. For example if you had:

class Duck extends AppModel {
	var $name = 'Duck';
	var $actsAs = array('Flying');
}

1. class Duck extends AppModel {
2. var $name = 'Duck';
3. var $actsAs = array('Flying');
4. }

You would be able to call FlyingBehavior methods as if they were methods on your Duck model. When creating behavior methods you automatically get passed a reference of the calling model as the first parameter. All other supplied parameters are shifted one place to the right. For example

$this->Category->fly('toronto', 'montreal');

1. $this->Category->fly('toronto', 'montreal');

Although this method takes two parameters, the method signature should look like:

function fly(&$Model, $from, $to) {
	// Do some flying.
}

1. function fly(&$Model, $from, $to) {
2. // Do some flying.
3. }

Keep in mind that methods called in a $this->doIt() fashion from inside a behavior method will not get the $model parameter automatically appended.