You probably know someone like this. They always offer to drive. They probably volunteer before you even finish the question, and would like to take their own car. They're up at 5 a.m. for the airport run, and they actually mean it when they say it's no big deal. Everyone calls them easygoing, low-maintenance, the perfect travel companion, and sometimes that's all there is. But for a certain kind of person, the offer has little to do with the favor. It’s about the seat.
According to a peer-reviewed study published in the Journal of Family Psychology, a steady sense of control over daily life acts like armor against depression and anxiety, while feeling powerless wears people down over time. This finding may explain a habit that nearly everyone has seen up close: that one friend in the group who always volunteers to drive.