The heartlines of human hands represent the innate nature of the emotion. It also gives hints of the relationships with other people.
Therefore, the different patterns of the heart line show the instinct of love in our deepest part of the heart and the way of expressing this love with the outside world.
If the heart line of the passive hand is curved and the heart line of the active hand is straight, it implies that the gentle romantic side of the owner is usually covered by the grim appearance.
The different pattern of the headline implies that the surrounding people will usually have a misunderstanding with the owner.