When is a mole not a mole…?

“Have a look at this thing on my chin. What do you think it is?”
“No clue.”
“Ah feck. Have a closer look.”
“Maybe it’s a mole.”
“That’s mad talk!”
“How could it be a mole?”
“What do you mean?”
“Well, if it was a mole, surely I would have felt its ickle paws on my skin?”
“Ah, you eejit!!!”