the common thing is love... trust... understanding
You should feel safe and secure with your partner and comfortable also and love, trust should be there in relationship people should make there bond strong by making each other comfortable nd understand each other conversations. when you love someone you love there each and every imperfect things , there scars nd everything you just give yourself to that person. A person should love there souls not there body or there face nd it goes to both girl nd boy. It can also be a virtue representing compassion, and affection the unselfish loyal and benevolent concern for the good of another.
Love each other not only by finding a perfect person in each other but by learning to see the imperfection in each other perfectly. That is called a relationship nd this all goes to both of them equally, nd yes both should give equal afford in there relation.