I carry it on my phone and have showed it to several people.

Less than fifty percent have noticed the incongruity unless prodded a little bit, "Look at it again." Even after the prod, there are folks who still didn't tumble. Well educated people, too. Amazing to me.

I believe that people are so numb to adverts they just don't pay attention.

Even my wife said, "Are you going to go on that rail of yours about "pregnant women showing off" again?" Then I gave her the verbal prod and she said, "Oh Dear Gawd!" and burst out laughing.