At the moment of orgasm...
"Our relationship with the world come through our five senses. Plunging into the world of magic means discovering other unknown senses, and sex propels us towards one of those doors.
...
At the moment of orgasm, the five senses vanish, and you enter the world of magic; you can no longer see, hear, taste, touch or smell. During those long seconds everything disappears to be replaced by ecstasy. It is exactly the same ecstasy as that attained by mystics after years of renunciation and disipline."
/ From 'Brida' by Pauld Coelho