There is no operational definition that would tell us at which step a social behavior becomes a sexual behavior. The number of step that this occurs at will vary from relationship to relationship or person to person. I struggle with this concept because I fail to understand how I can be two people at once. I have this mind blindness problem of perceiving my behavior as who I am. This comes from a result of lots of bullying over the years that created a lot of post-traumatic stress disorder.
I often jump to sexual behavior at step two because I am trying to get a girlfriend. There is nothing preprogrammed to be inside of my brain. This means that I struggle with coming on too strong in social interactions. The set of social skills needed to interact with an acquaintance are social behavior skills and non-sexual. The social skills are sexual in nature and therefore sexual behaviors.