“Kimberly does, but Cheryl doesn’t. Mamma does, but daddy doesn’t. Your Mouth does, but your tongue doesn’t”.
You got the difference?
[spoiler name=”<-- Click here for the solution"]With the first words the lips are touching each other while you're not closing your mouth with the second. Most of times it takes a while before people start to understand the trick, especially when you're using a lot of living things like persons and animals because they're looking for charisterics of them instaed focussing on the words.[/spoiler]
P.S. Both ladies have climbed the Kilimanjaro for Comic Relief and thus raised (with 7 others celebrities) an amazing 3,4 million pound!