Sex is sex and philosophy is philosophy. For an SJ, courting is something one does before vows are taken. Once the bargain is sealed, they are prepared to give priority of getting ahead in business, establishing a home and family, making a circle of friends and establishing social connections. Sexual routines are apt to be established early in marriage and observed throughout life. A male SJ may, perhaps, explore other relationships outside the framework of his marriage, but only if particularly dissatisfied at home.
Sex is a more serious business.
While an SP could use sex to forget his or her troubles, an SJ, particularly a male SJ, would be more likely to use sex to ease fatigue, wanting to be comforted both emotionally and physically. After sexual release has been obtained, the SJ is apt to be most solicitous of the physical comfort and welfare of the other. While other types might see sex as a mutually pleasing activity, from which both males and females benefit equally, the SJ male is apt to express gratitude to his partner for the sexual experience, communicating the message that something has been done for him, that his needs have been served, that a favor has been done. The possibility of a mate enjoying the experience equally, or needing the experience equally, is not often conceptualized by him. A female SJ is likely to go along with this position, placing the sexual needs of her mate over any she might have, perhaps seeing sex as a wifely chore rather than a pleasure.