One of my pet hates is the negative pre- conceptions that people have about only children. I am an only child, and I have 1 ds (haven't ruled out having more but haven't ruled it is IYSWIM!)
Anyway, just want to put some myths to bed:
(I've cut and pasted this from thec web)
Only children are no more lonely than others. People assume that only children grow up alone, without the benefit of child company. In fact, the parents of only children generally provide them opportunities for child companionship, via neighborhood play groups, school clubs and sports teams.
Only children are no more selfish than others. In the past, people assumed that only children were over-indulged and therefore, spoiled by their parents. But now we know that parents of only children do not over-indulge them, but rather these parents indulge their children just enough to motivate them to meet their expectations. Thus, only children do not grow up to become selfish adults.
Only children are no more maladjusted than others. Several studies of the mental health of children without siblings indicate that these children are as well adjusted as others. This is not to say that there are no maladjusted only children, but that the proportion of maladjusted "onlies" is the same as the proportion of maladjusted children from larger families.
Only children have higher self-esteem than others. Positive attention from parents helps children develop and maintain a positive view of themselves. Only children have an advantage here in that they receive more attention from their parents than children from larger families. This positive attention does not spoil children, but rather allows parents to monitor their children and take corrective action when needed.
Only children achieve more than others. Because the parents of only children have more time and other resources to devote toward their child's development, only children tend to do better in school and complete more years of education than others. Consequently, only children later tend to have more prestigious occupations than others