In normal dating situations, the people dating are usually paired by society or by their groups expectations. The pair knows how to deal with the other since they come from the same background. That is what is considered normal dating practices. However, there has come up in society other reasons for dating that include self actualization or a need to mingle with other people in a dating context that has nothing to do with background and societal expectations. That is where fuck buddies sex can help.
A person who has needs that are not societal but personal or existential in nature can find someone online to interact with as if they were a part of the original purpose of dating, finding a partner, without feeling threatened to have to marry or to maintain that relationship for an extended period as would be the case when dating someone from one’s immediate group. The partner would be expected to ease that person’s sexual and other emotional needs.