The Far East provides a very good example of a metaphysically informed theory of sexual love. It revolves around an immaterial fluid called tsing, aroused in a man and a woman when they meet. This fluidic activation occurs without physical contact and is a result of the simple presence of the opposite sex. We could also refer to tsing as a kind of energy, much like that involved in magnetism, which springs from the polarity of the yin and yang, these latter being understood as they principles of male and female sexuality (and of all differentiation, for that matter).
As a result of this theory, we can make sense of certain social norms that regulate contact between the sexes in ways that seem absurd by modern standards. For example, it is stated that no woman can visit a man except in the present of another man, particularly if the first man is married. This applies to all women, for sex has no age, and to break the rule even in the most innocent of ways is to have sinned. This is because a man and a woman alone in one another’s presence is enough to create the ‘charge’ in the tsing and this is prior to any physical contact and is the source of the arousal that drives physical contact. Physical contact itself, whether the brushing up against one another in obedience to an irresistible and unconscious urge, or the intentional holding of hands, or the more explicitly romantic forms of contact that follow. The third and final degree is reached in actual coitus.
The initial arousal of the tsing is treated as a sin because it is in fact the first step in the process that leads to actual union and so cannot be treated as neutral. It is the first degree of arousal that results in a psychological displacement or what could be called a state of intoxication and obviously leaves the participants somewhat at its mercy and compromises rational judgement thereafter. Hence the norms we find in those societies where the sense of the underlying nature of things has been retained.