If you take some boys to the zoo.......

They may befriend a goat...being friends with a goat will make them think of helping them out.....
.....so they are going to want to help clean up their pens...cleaning the pens will make them think of their mother telling them their rooms are a pig sty.....so......

..........they will want to visit with the piggies....sometimes their mother tells them they eat like pigs....which will remind them.............

.....that the pigs might be hungry.....so you if take some boys to the zoo...they are going to want to feed the pigs.