Tero Dai dude ....."I was just wondering if premarital sex can be regarded as a case of moral degradation. Is there any justification for sex before marriage on moral grounds.".......... Extramarital sex is a case of moral degradation however premarital sex is not in most cases (like if you had had sex with someone else before you ever met and decided to get married to your would be wife). Premarital sex becomes (or should become) irrelevent after the marriage.