Advertisement by rational minds

"What are you waiting for? Just go for it"
A lot of advertisers who think they have complete control over the human mind feel that adding this line at the end of their advertisement will elicit "action" from the consumer - Will move the consumer to put his hands into his purse and purchase the product. Well if it were true then advertising would be child's play and every one would be an ad guru. For god's sake such crass logic needs to directed straight into the trash can.
If there is anything that can be a call to action, it is the complete communication. And that alone may not even suffice.