'It sat in his hand like a light bulb' -The similie suggests how brightly the pear shines now it has turned to gold
Pure selfishness -The use of a short sentence shows annoyance and anger , these are the emotions Mrs.Midas has towards Midas now.
'Separate beds' -This sentence shows us that Midas' condition is so bad they are no longer able to have one bed, the reader can also infer from this that they are slowly growing apart.The short sentence shows bluntness,sadness and anger.
He was below turning the spare room into the Tomb of Tutankhamen' -The use of this metaphor suggests how extreme his condition is comparing everything he touches to that of an Egyptian King,this shows the extremity of his problem as Duffy compares it to something so great
'He sat in that chair like a King on a burnished throne'