That is how I was raised to value sex or love-making. Some might see it as something that just fulfills their physical needs. If one person sees it as sharing a special bond between two people who love each other emotionally and one sees it as pure physical enjoyment for the moment then it is probably immoral. The reason it would be immoral is because the people are obviously not communicating and are using each other for different reasons. So, if two people go to a bar to find sex and they find each other then let them go.
Sex is something that is shared between two people for whatever reason.
The meaning and ideas of making love, sex, intercourse are all different to each individual. This is were the problem exsists. To me, making love is a term that should be used when there is caring, loving, carressing, and so on. It is to be used when a relationship is not only at a physical level but also at a good communication level. If one wants to have casual sex then you better make sure that both people are crystal clear on the stipulations.