And they are:
The Doctor because he says; "Take your clothes off"
The Dentist because he says; "Open wide"
The Milkman because he says; "Do you want it in the front or the
back"
The Hairdresser because he says; "Do you want it teased or
blown"
The Interior Decorator because he says; "Once it's in, you'll love
it"
The Banker because he says; "If you take it out too soon, you'll
lose interest"