Obviously the question is about relationships. Having love in a relationship, is all you really have to have. As long as your in love with the person, NOTHING else should matter. Religion, gender, money, beliefs, looks, interests, social standings, politics nothing else should matter but the mutual attraction called love (almost).
Even though the Beatles were cool dudes, love is not all you need. You need food, water, and oxygen to live. You also need a heart, a brain, and also all those other vital organs. You also need a body. Some people do fine and they don't have love. So many people are single.