His study with Yarbrough covered touch sequences and individual touches. Touch sequences fall into two different types, repetitive and strategic. Repetitive is when one person touches and the other person reciprocates. The majority of these touches are considered positive. Strategic touching is a series of touching usually with an ulterior or hidden motive thus making them seem to be using touch as a game to get someone to do something for them. More common than the sequential touches are the individual or single touches. They must be read by using the total context of what was said, the nature of the relationship and what kind of social setting was involved when the person was touched. Yarbrough designed a blueprint for how to touch. She designated the different body areas as to whether they are 'touchable' or not. Non-vulnerable body parts (NVBP) are the hand, arm, shoulder and upper back, and vulnerable body parts (VBP) are all other body regions. Civil inattention is defined as the polite way to manage interaction with strangers by not engaging in any interpersonal communication or needing to respond to a stranger's touch. Goffman uses an elevator study to explain this phenomenon. It is uncommon for people to look at, talk to, or touch the person next to them. While it may be so crowded that they 'touch' another person, they will often maintain an expressionless demeanor so not to affect those around them. It is more acceptable for women to touch than men in social or friendship settings, possibly because of the inherent dominance of the person touching over the person being touched. Women and girls are commonly known for interacting with each other through touch than men and boys do as same-sex touch is acceptable for women. Whitcher and Fisher conducted a study to see whether therapeutic touch to reduce anxiety differed between the sexes. A nurse was told to touch patients for one minute while the patients looked at a pamphlet during a routine preoperative procedure. Females reacted positively to the touch, whereas males did not. It was surmised that males equated the touch to being treated as inferior or dependent. Touching among family members has been found to affect the behavior of those involved. Touch is a way that a child can express positive emotion. For example, physical affection, like hugs, can serve as an overt display of love. Various factors are at work within a family setting. As a child grows older, the amount of touching by the parent decreases although it does continue to be an important social behavior for that child to communicate positive or negative emotions later in their future.