Selflessness is crucial for harmony. Put your partner’s needs first, making sacrifices with time, money, or plans to support their happiness. For men, it could mean staying home instead of going out; for women, giving space for hobbies. If both spouses focus on making each other happy, everyone’s needs get met. Avoid selfishness—letting “me first” attitudes dominate causes unhappiness. Mutual sacrifice and consideration create lasting satisfaction for both partners.