Husband and Wife (2613).--The conjugal Debt (2614-2617).--Morality in Marriage (2618, 2619).--Contraception and Onanism (2620).-- Birth-Control (2621, 2622).--Cooperation with Contraception (2623).-- Recapitulation (2624).--Regulae pro Confessariis (2625).--The Duty of Conjugal Companionship and Assistance (2626).--The Obligation of Marrying (2627).--The Duties of Engaged Persons (2628, 2629).--The Duties of Parents (2630, 2631).--Sex Education (2632).--The Duties of Children (2633).--The Duties of Other Relatives (2634).--The Duties of Superiors (2635).--The Duties of Subjects (2636).--Taxes (2637-2642).-- Voting (2643-2645).--The Duties of Employers (2646, 2647).--The Duties of Employees (2648).--Labor Disputes (2649).--Employment (2650).--The Duties of Certain Professions (2651). Question IV THE DUTIES OF MEN IN THE USE OF THE SACRAMENTS INTRODUCTION (2652, 2653) Art. 1. THE SACRAMENTS IN GENERAL: THE SACRAMENTALS Nature of a Sacrament (2654).--Matter and Form (2655-2660).--Necessity of the Sacraments (2661-2663).--The Minister of the Sacraments (2664).--Requisites for Valid Ministration (2665-2668).--For Lawful Ministration (2669, 2670).--The Recipient of the Sacraments; Requisites for Valid Reception (2671-2674).--Requirements for Lawful Reception (2675).--Obligations of the Minister in Reference to the Recipient (2676-2682).--Obligations of the Recipient in Reference to the Minister (2683).--The Sacramentals (2684). Art. 2. BAPTISM; CONFIRMATION; THE EUCHARIST; THE SACRIFICE OF THE MASS Introduction (2685).--The Sacrament of Baptism (2686).--Solemn and Private Baptism (2687).--Duties of Pastors (2685).--Duties of Parents and Guardians (2689).--Duties of Sponsors (2690, 2691).--Duties of Adult Recipients (2692).--Duties of the Minister (2693).--The Sacrament of Confirmation (2694).--The Minister (2695).--The Recipient (2696).-- The Sponsors (2697).--The Pastor (2698).--The Sacrament of the Eucharist (2699).--Matter and Form of the Eucharist (2700).--The Minister of Consecration (2701, 2702).--The Minister of Communion (2703).--The Communicant (2704).--Worthy Communion (2705).--Frequent Communion (2706).--Duties of Parents, Pastors, Confessors (2707).--The Custody and Worship of the Eucharist (2708).--The Sacrifice of the Mass; the Celebrant (2709).--The Obligation of Saying Mass (2710).-- Dispositions for Celebration of Mass (2711).--The Circumstances of Mass (2712).--Interruption of Mass (2713).--Application of Mass (2714, 2715).--Stipends (2716). Art. 3. REPENTANCE; PENANCE; EXTREME UNCTION