Originally Posted by cambaby

When a man and woman have joined together in a loving and holy marriage union, they may sometimes find that their love for one another and for God spills over outside of their relationship. Or they may find that other people are drawn to the joy, bliss, and passion that they radiate. In such situations, the desire or opportunity may arise to involve a third individual in their relationship ? to form a threesome. Is this a temptation into sin, or a calling to a higher spiritual love? The answer is not clear in all situations, so we must turn to the Scriptures for guidance.
http://www.sexinchrist.com/threesome.html