Whan air is blown in between two balls suspended close to each other, they are attracted towards each other. Why?

When air is blown In between two balls suspended close to each other they are attracted towards each other why?

Assertion : When two boats sails parallel in the same direction and close to each other, they are pulled towards each other. Reason : The viscous drag on a spherical body moving with speed v is proportional to v .

When air is blown in between the two balls, will they attract or repel?

Like poles attract each other.