Coitus reservatus (coitus, "sexual intercourse, union" + reservatus, "reserved, saved"), also known as sexual continence, is commonly thought of as a form of sexual intercourse in which the penetrative partner does not attempt to ejaculate within the receptive partner, but instead attempts to remain at the plateau phase of intercourse for as long as possible avoiding the seminal emission. Another term used for this kind of relationship is the word karezza.
The word karezza is generally believed to be derived from the Italian word "carezza" meaning "caress". However, Alan W. Watts believed it was a Persian word. Alice Bunker Stockham coined the word karezza and is akin to maithuna in Hindu Tantra and Sahaja in Hindu Yoga.
The Rosicrucians have used "coitus reservatus" or "karezza" as an esoteric practice.
Read more about Coitus Reservatus: The Practice of Karezza, Coitus Reservatus, The Rosicrucians, Controversy