create trigger which inserts rows depending on enum values?

Question

I'm quite new to triggers and I ran into general problems. I'd like to achieve this:

CREATE TABLE `searcharticles` (
 `articleID` int(11) unsigned NOT NULL,
 `ean` char(13) COLLATE utf8_unicode_ci DEFAULT NULL,
 `manufacturerNumber` varchar(20) COLLATE utf8_unicode_ci NOT NULL,  
 PRIMARY KEY (`articleID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci


CREATE TABLE `addresses` (
 `articleID` int(11) unsigned NOT NULL,
 `shop` enum('shop1','shop2') COLLATE utf8_unicode_ci NOT NULL,
 `url` varchar(255) COLLATE utf8_unicode_ci NULL,
 `status` tinyint(3) NOT NULL DEFAULT '0',
 `createTime` datetime NOT NULL,
 `updateTime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
 PRIMARY KEY (`articleID`,`shop`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci 

When a new row is inserted in searcharticles, the table addresses should be filled, but not only once. I'd like to make a record for every shop that is in enum shop (I know this is not well designed). I'm stuck at this:

CREATE TRIGGER ins_addresses AFTER INSERT on searcharticles
FOR EACH ROW
BEGIN
  INSERT INTO addresses(articleID, shop, createtime) VALUES(NEW.articleID, ?, CURRENT_TIMESTAMP);
END

How could I iterate through the possible enum values to trigger an insert with 'shop1' and another with 'shop2' without writing a possible shop name in the insert?