Want people to interact with your advertising? Make them part of it. Make it personal. Like this ad from OB:
Yes, it is for tampons. But people are forwarding it. It is viral!
via: Client K.
in·ter·est·ing-ness [in-ter-uh-sting-ness, -truh-sting-ness, -tuh-res-ting-ness]
-adjective
1. stuff we're finding interesting