Sex in marriage helps develop the most intimate of adult relationships. Intimacy is the primary asset of a marriage and any time it is spent outside the marriage the other partner is cheated of a very precious aspect.
Sex outside marriage, either physical, electronic, or simply imagined injures the intimacy between the partners and cheats the marital partner of a primary marital asset. It is cheating.

I'm almost a newlywed so at this point sex is a huge part of our relationship. It is one way we are becoming more and more intimate.
The intimacy of our marriage will hopefully continue to grow even as the effects of age ravage our physical bodies.
We are guarding the intimacy of our marriage to the best of our ability.
smile