The barber in a certain town shaves all the people who don't
shave themselves. Who shaves the barber?
This is meant to be a clever little paradox with no solution
but you can annoy the asker intensely by saying it's easy and
that the barber is a women.
You can then ask the following (a version of Russell's
Paradox, - point this out too): in a library there are some
books for the catalogue section which is a list of all books
which don't list themselves. Shold he or she include this book
in its own list? If so, then it becomes a book which lists
itself, so it shouldn't be in the list of books which don't
and vice versa. This should keep the most determined assailant
at bay while you attack the wine.
-- R. Ainsley in Bluff your way in Maths, 1988