Shakti Sanga Samkshubdha - Shakthyaveshavasanikam| Yatsukham Brahmatathwasya Tatsukham Swakyam Uchyate||
In all of the Vignana Bhairava Tantra, it is this verse and the next that refer to the topic that Tantra is famously misunderstood and misquoted for. Shiva tells his wife Parvathy, yet another way of experiencing the truth.
At the time of union with shakti (woman) in a physical communion, there is an experience of excitement at the time of getting absorbed in the experience. That experience of pleasure when witnessed totally, you discover the Brahma Tatwa. Watching that experience dispassionately gives you a glimpse of the one who watches - the Brahman.
Tantra is unique in the sense that it does not deny any aspect of life by calling it bad or taboo. It includes every aspect of daily life, including sex and showing the means of realisation through all that we do. - Swahilya Shambhavi. (Tiruvannamalai hills from my view atop a building's terrace.)