It is healthy to not have sex or contact with unhealthy. Unhealthiness and lack of vitality is a result of overconsumption and gluttony on behalf of the individual or his parts, either that or the individual being a victim of. Contact with others should not be lusted for. Hunger for sex is a sign of imbalance and indifference to other's suffering.
This is where I believe vegetarians have a major advantage. They have an easier time knowing righteous deed from villainous. An unconscious man, a toxic man poisons his wife and sucks her vitality from her. When he talks he does so to weaken the defenses and possess and when he touches he does so to rub off his blackness unto her and to take from her the happiness he envies. He is an abuser, even if he is kindest man in external actions if his unconscious actions, subtle actions are of abuse, he is unclean and a defiler.
There is opportunity for progress. But it is not for the common man, it is not for population in fermentation. This is the bliss of sexuality, the truth and untainted beauty. Unconscious structure which leaves us in fascination and awe. This is what is holy and sacred. This is progress and alchemical transmutation.
Alchemy is the goal in sexuality. Don't ask what can you take, don't ask what you can give. Ask what can you transmute. Do not give to the beggar, for he is a slave of the abuser and the poisonous. A slave is an extension of another, it is the hand of the owner. This is why promiscuousness is not energetically favored by divine grace, because the potential for abuse in individuals and metaphysical counterparts.
If one be a slave, let it be mutual beneficial enslavement, that is the true contract of marriage.
Uncontrolled release of sexual essence is the tumbling stone, it's a symbol of selfishness and mindlessness yet it is also a symbol of kindness and mercy. So to end the confusion, without alchemy, sex is just plunder or economic exchange of currency, nothing sacred.