As the doctor completed an examination of the patient, he said:
- I can"t find a cause for your complaint. Frankly, I think it"s due to drinking.
- In that case, - said the patient, - I"ll come back when you"re sober.
A cat uses whiskers to determine if a space is too small to squeeze through. The whiskers act as antennae, helping the animal to judge the precise width of any passage.