There are only two things a child will share willingly -- communicable diseases and his mother's age.
Source: In Barnes & Noble Book of Quotations, by Robert I. Fitzhenry, 1987.
-- Benjamin Spock, (May 2 1903-1998), US physician, author; He was a major influence on modern U.S. child-rearing practices; Common Sense Book of Baby and Child Care, 1946 has sold millions of copies.