The problem isn’t just the physical act of adulterating the marriage bed; in fact, the greater problem, as is the case with any sin, is that people no longer see fit to HONOR marriage!!! (Heb 13:4)
Following Jesus includes living for others, as Jesus did when He healed the multitudes everywhere He went. We are to lay down our lives for others, someway, somehow, as the Spirit leads each of us. Jn 15:13 - It is then we will be blessed/happy. Jn 13:17