Benjamin and...HORSES?

My conversation with Benjamin today while riding in the car.

Benjamin:  (Sees a horse trailer full of horses)  Look at those horses in that cage.

Me:  That's a horse trailer - to transport horses from one place to another.

Benjamin:  Mommy, I want a horse.

Me:  (Oh, crap)  You do?

Benjamin:  Yes.  I think we can buy one at the store.

Me:  Well...we could...but (buying time)...WHERE WOULD WE PUT IT?  (I've got him now!)

Benjamin:  We could buy a farm.  A big farm!  A REALLY big farm.  Yep, we could.

Me:  (Silence)