Speaker Vs MP

I wo dogs were discussing their masters.
The first said, 'My master is the speaker of the House, when I start barking, he cannot stand it and keeps saying, "please, please, please ..." to stop me from barking.'
The other, belonging to an MP, said, 'At least your master is polite. Mine is a most devious man. After abusing everyone in the house he has the audacity to put a signboard on his gate, "Beware of the dog"