Excessive investment from others is a red flag in relationships.

A person’s time, money, and energy are all finite. As the cost goes up, the return on investment goes down. Put another way, it’s economically unsustainable to maintain high-level giving in a relationship over the long term—eventually, the relationship will fall apart. If you keep demanding too much for too long, you raise the cost for your partner to stay with you. Without corresponding value in exchange, it becomes easy for someone else to step in.

When stock prices hit a peak, who wouldn’t want to cash out and move on?

Why do the men who treat you best end up leaving you?