Observant student

It was a practical experiment in a college psychology class. 

 

The professor brought out a large cage with a male rat in it.

 

The rat was positioned in the middle of the cage.

 

The professor put a piece of cake on one side and added a female rat on the other side.

 

The male rat ran towards the cake and ate it.

 

Then, the professor changed the cake and put in some cheese. The male rat ran towards the cheese.

 

This experiment went on with the professor changing the food and, every time, the male rat ran towards the food item and never towards the female rat.

 

The professor said: "This experiment shows that food is the most important attraction for males."

 

Then, one of the students from the back row said, "Sir, why don't you change the female rat?  She might be his wife."

 

Thanks Richard