Before Edison Witty and genuine idea of inventing bulb what came up on hi mind? 

1- How many divorced men does it take to change a bulb? 

Who Cares?

Then ever get the house any way...

2- How many psychiatrist does it take to change a bulb?

Only One, but the bulb has to willingly to be changed.

3- What expectation a light bulb give to married men?

It gives new hope to them.