More commonly, now, it is thought that sex is right with anyone you love in the sense of a “romantic” involvement. And on the other hand sex without romantic feelings is thought to be wrong even if the sexual partners are married. Often the “romantic love” in question turns out upon examination to be nothing more than precisely that fantasized lusting that Jesus called “adultery in the heart.” One is not in love but in lust, which glorifies itself as something deeper in order to have its way.
