The quote means that people often give love to someone who may not deserve or need it. This can be seen in relationships where one partner gives more love than the other, when a parent loves a child regardless of their actions, or when people give love to ungrateful friends, work colleagues, or family members. While showing love and compassion is an important part of relationships, it often starts to feel like a one-way street when it is given to someone who does not appreciate it or actively ask for it.