In the ordinary sexual orgasm you meet as two excited beings -- tense, full of excitement, trying to unburden yourselves. The ordinary sexual orgasm looks like madness; the tantric orgasm is a deep, relaxing meditation. Then there is no question of how often one should indulge. You can indulge as much as you like because no energy is lost. Rather, energy is gained.
You may not be aware of it, but this is a fact of biology, of bio-energy, that man and woman are opposite forces. Negative-positive, yin-yang, or whatsoever you call them, they are challenging to each other. And when they both meet in a deep relaxation, they revitalize each other. They both revitalize each other, they both become generators, they both feel livelier, they both become radiant with new energy, and nothing is lost. Just by meeting with the opposite pole energy is renewed.
The tantric love act can be done as much as you like. The ordinary sex act cannot be done as much as you like because you are losing energy in it, and your body will have to wait to regain it. And when you regain it, you will only lose it again. This looks absurd. The whole life is spent in gaining and losing, regaining and losing: it is just like an obsession.
The second thing to be remembered: you may or may not have observed that when you look at animals you can never see them enjoying sex. In intercourse, they are not enjoying themselves. Look at baboons, monkeys, dogs or any kind of animals. In their sex act you cannot see that they are feeling blissful or enjoying it -- you cannot! It seems to be just a mechanical act, a natural force pushing them towards it. If you have seen monkeys in intercourse, after the intercourse they will separate. Look at their faces: there is no ecstasy in them, it is as if nothing has happened. When the energy forces itself, when the energy is too much, they throw it.
The ordinary sex act is just like this, but moralists have been saying quite the contrary. They say, "Do not indulge, do not `enjoy'." They say, "This is as animals do." This is wrong! Animals never enjoy; only man can enjoy. And the deeper you can enjoy, the higher is the kind of humanity that is born. And if your sex act can become meditative, ecstatic, the highest is touched. But remember tantra: it is a valley orgasm, it is not a peak experience. It is a valley experience!
In the West, Abraham Maslow has made this term "peak experience" very famous. You go into excitement towards the peak, and then you fall. That is why, after every sex act, you feel a fall. And it is natural: you are falling from a peak. You will never feel that after a tantric sex experience. Then you are not falling. You cannot fall any further because you have been in the valley. Rather, you are rising.
When you come back after a tantric sex act, you have risen, not fallen. You feel filled with energy, more vital, more alive, radiant. And that ecstasy will last for hours, even for days. It depends on how deeply you were in it. If you move into it, sooner or later you will realize that ejaculation is wastage of energy. No need of it -- unless you need children. And with a tantric sex experience, you will feel a deep relaxation the whole day. One tantric sex experience, and even for days you will feel relaxed -- at ease, at home, non-violent, non-angry, non-depressed. And this type of person is never a danger to others. If he can, he will help others to be happy. If he cannot, at least he will not make anyone unhappy.
Only tantra can create a new man, and this man who can know timelessness, egolessness and deep non-duality with existence will grow. A dimension has opened. It is not far away, the day is not very far away, when sex will simply disappear. When sex disappears without your knowledge, when suddenly one day, you realize that sex has disappeared completely and there is no lust, then BRAHMACHARYA is born. But this is arduous. It looks arduous because of too much false teaching, and you feel afraid of it also because of your mind's conditioning.
-Osho, "Vigyan Bhairav Tantra, Vol 1, #34, Q2"
Tantra says, if you move into meditation sex will disappear completely; it can disappear completely. The whole energy is being absorbed at higher centers -- and your body has many centers. Sex is the lowest center, and man exists at the lowest center. The more energy moves higher, the more the higher centers begin to flower. When the same energy comes to the heart, then it becomes love. When the same energy comes higher still, new dimensions and new experiences begin to flower. And when the same energy is at the highest, at the last peak in your body, it has reached that which tantra calls SAHASRAR - the last chakra in the head.
Sex is the lowest chakra and sahasrar is the highest, and between these two the sex energy moves. It can be released from the sex center. When it is released from the sex center you become a cause to reproduce someone else. When the same energy is released from the sahasrar, from the head into the cosmos, you give a new birth to yourself. It is also reproduction, but not biologically. Then it is spiritually a reproduction; then you are reborn. In India we used to call such a person "twice-born" - DWIJ. Now he has given himself a new birth. The same energy has moved.
Tantra has no condemnations, only secret techniques for how to transform. That is why tantra talks so much about the body -- it is needed. The body has to be understood, and you can start only from where you are.
-Osho, "Vigyan Bhairav Tantra, Vol 1, #20, Q2"