Roller coaster phobia combine substantial heights with seemingly insignificant support, as well as free-falls and the illusion of uncontrolled drops. Because acrophobia involves an extreme fear of heights and falling, these conditions could cause someone who is an acrophobic to have an extremely negative reaction to riding roller coasters. Claustrophobia involves two parts, fear of physical restraint and fear of suffocation. The safety harnesses and enclosures on some rollercoaster and other rides are very restrictive, in order to protect the riders from harm. In addition, the speed of these rides can cause air displacement that makes it difficult for riders to catch their
Fear of intimacy of desired intimacy. This study also found that the level of the woman's fear of intimacy is a good indicator of the longevity of a couple's relationship. Another study determined that women who fear intimacy generally perceive less intimacy in their dating relationships even if their partner does not have this fear. This study also found that fear of intimacy in women plays a key role in the intimacy of the relationship and in the relationship's likelihood of survival. Also, it was determined that "[fe]males who were taught not to trust strangers consistently experienced greater fear of intimacy and more