From the source: Ankhing Sexual Energy
“Egyptian Sexual Energy and the Orgasm
It was believed in ancient Egypt that the orgasm was the key to eternal life, and that it was intimately connected with the chakra system. A chakra is an energy vortex connected to the entire human energy field, and the Universal Heart Chakra is the fifth of thirteen chakras. (There is also a system of eight chakras; in that system, the heart chakra is number four.) The Egyptian system held that the orgasm was intimately connected to this fifth, or Universal Heart Chakra.”