'All right then. Let's see if I've grasped the problem. You have mouth ulcers and they're driving you to distraction. You're beside yourself, not so much for reason of any physical suffering, but rather, you're in dread of them causing you embarrassment? In communicating, they could just happen to speak with people present. And let's just say, explanation would be impossibly difficult. That's the reason for your anxiety?'
'Well, obviously. I mean ... you betcha, Bob!'
'Do be calm. And just, Doctor, will do.'
'No offence intended.'
'None taken. I think we might start by taking a look at them, shall we?'
'They're not a pretty sight Doc'. Fair warning. Best prepare yourself before you go poking about.'