Depends who you are really.
For plenty of people out there the order goes
BJ, Consensual missionary position sex, pregnancy, marriage, divorce.
Complete abstinence, marriage, crazy wild monkey sex, guilt, confessions, more crazy wild monkey sex, divorce from guilt.
Or the many other options including weird hookup sex that results in one person becoming awkwardly attracted to the other while to said other, it is still a casual, physical only relationship.