"Elective Surgery"

The conversation ended with a sad little voice saying, "But, I want my brain back."  Seems one imaginative little rider thought it would be neat if you could change brains with someone or something else.  The only problem was he didn't know how to do brain surgery.  Lucky for him the little boy in the seat with him said he did know how to do brain surgery.  Then plans were made for who would be swapping with whom.  The young man across the aisle wanted to be a part of the great experiment but it did not turn out as he had hoped.  They spotted an old horse, on the side of the road, that was far from a show animal and told him they were going to trade his brain for the horse's brain.  He was not at all happy with the prospect.  Taking into account all the advantages and disadvantages, I'm not sure the horse would have been crazy about it either.