I. The doctor, because he says, 'Take your clothes off'

2. The dentist, because he says, 'Open wide.'

3. The hairdresser, because he says, 'Do you want it teased or blown?'

4. The milkman, because he says, 'Do you want it in the front or back?'

5. The interior decorator, because he says, 'Once it's in you'll love it.'

6. The banker, because he says, 'If you take it out too soon you'll lose interest.'