gender

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'gender',
		'value'   => 'girl',
		'compare' => 'REGEXP',
	),
	array(
		'key'     => 'gender',
		'value'   => 'men',
		'compare' => 'REGEXP',
	),
);