The reality is that most people can only tolerate a certain amount of closeness. We are defended about letting someone else in. When viewing the world from critical or distrusting eyes, we tend to write off a range of potential partners before even giving them a chance. A friend of mine felt closed off to a man who pursued her for more than a year. The men she was drawn to instead tended to be unreliable and emotionally distant.
Connotation, having sex is a neutral, accepted event and it is us humans who have placed all sorts of crazy meanings and rules and conditions onto it. Sex is neutral. Consumption sushi is neutral. Same-same, right? I am recently single after a all but five- year-long relationship.