Marva Dawn makes a distinction in her writings between genital sexuality and what she calls social sexuality. Social sexuality refers to how men and women relate to each other ("not as partners in intercourse"). She observes that partly because of society's mad rush to meet deeper emotional needs by the frantic abuse of genital sexuality, there is much confusion between genital sexuality and social sexuality. In her book, The Sense of the Call she notes the "New Testament language is lavish with words for love that help us build and revel in strong relationships of social sexuality with other members of our churches or other communities." She calls us to "Imagine both the delight and the strength for carefully disciplinng eros if we develop rich bonds of affection and chaste intimacy with all the following kinds of love. What is interesting is that all of these words may apply to growing, flourishing, deep cross-gender friendships--as Dawn points out herself
Agape: Only God is fully capable of this love, but God loves us with this kind of love and through us this love keeps us from sexual exploitation.
Philia: Friendship love built upon interests/passions in common. This love especially guards us against genital folly because both parties share a love for something else.
Storge: motherly/fatherly kinship love. This binds together families, and the more closely knit we are to relatives and friends who are devoted to us and affirm us, the less desperate we are for genital involvement.
Philadelphia: brotherly/sisterly friendship love.
Philostrorge: this word is used only in Romans 12:10 to emphasize deep friendship/family love, a knitting together by blood ties and affection (remember Whose!) and the common interests of serving God, the Church, and the world together.
This word just doesn't apply to married couples, or families, or to same sex relationships, but for men and women in relationships too: "love one another with mutual affection; outdue one another in showing honour."