What are the similarities and differences between trains and love?

The difference between a train and love is that a train has no emotions and thoughts. Love is different. And thinking is a double-edged sword. For people with good ideas. He (she) will not hurt you. He (she) will cherish you. Similarly, both trains and love need to be done step by step. In order to get more "returns". My experience is not high. Please don't blame, thank you.