Belial: Sex is simply a way to organize energies. Among many others. Emotions, feelings, arts, fights, war, spells do the same thing as well. When energies are ordered over a regular, geometric layout, there are conditions for a certain vibration to manifests itself. Living beings are just that: crossings of energy vortexes. Universe itself is the equally that for the Universe is as much alive and conscious as the individuals dwelling in it.
Certain emotions, like fear distort vibration and this is how manifesting a certain thing is blocked. Anger also my shape a certain manifestation. It gets a very specific touch (print) on the energetic pattern of the end result.