Don’t take the sex act as going anywhere. Don’t take it as a means – it is the end in itself. There is no end to it; it is not a means. Secondly, don’t think of the future; remain with the present. And if you cannot remain in the present in the beginning part of a sexual act, then you can never remain in the present – because the very nature of the act is such that you are thrown to the present.
Remain in the present. Enjoy the meeting of two bodies, two souls, and merge into each other – melt into each other. Forget that you are going anywhere. Remain in the moment going nowhere, and melt. Warmth, love, should be made a situation to melt into each other.
That’s why, if there is no love, the sex act is a hurried act. You are using the other; the other is just a means. And the other is using you. You are exploiting each other, not merging into each other. With love you can merge. This merging, in the beginning, will give many new insights.
If you are not in a hurry to finish the act, the act by and by becomes less and less sexual and more and more spiritual. Sex organs also melt into each other. A deep, silent communion happens between two body energies, and then you can remain for hours together. This togetherness moves deeper and deeper as time passes. But don’t think. Remain with the moment, deeply merged. It becomes an ecstasy, a samadhi. And if you can know this, if you can feel and realize this, your sexual mind will become non-sexual.

Vigyan Bhairav Tantra, Vol. I