Tantra is not teaching sexuality. It is simply saying that sex can be a source of bliss. And once you know that bliss, you can go further because now you are grounded in reality. One is not to remain with sex forever, but you can use sex as a jumping point. That is what tantra means: you can use sex as a jumping point. And once you have known the ecstasy of sex, you can understand what mystics have been talking about - a greater orgasm, a cosmic orgasm.
Tantra says be real, be authentic to yourself. Your happiness is not bad; it is good. It is not sin! Only sadness is sin, only to be miserable is sin. To be happy is virtue because a happy person will not create unhappiness for others. Only a happy person can be a ground for others' happiness.
