Institutionally based, restrictive relationships, such as those among family members or professional colleagues, must thus be contrasted with instrumentally based, nonrestrictive rela- tionships serving the aims of practical pursuits, such as those between freely practicing experts and their clients or between sellers and buyers. In instrumentally structured situations it is not necessary for the participants to curb their needs, because the mere expression of needs in no way compels others to gratify them, as it tends to do in the family.¹⁹ Indeed, not only is the frank expression of needs not inhibited, but it is often encouraged, since it helps to identify a problem or need for which someone might have a solution or satisfaction.