When chatting with girls, boys always drive without saying anything. What does this mean?

First of all, this boy is not serious. He may be driving because he is an old driver. He is used to driving and has few words. Maybe this is his way of making friends, but he thinks he is a love rat, a dishonest love rat who loves flirting, that is, a casual person in his mouth. This boy likes chatting with girls. In other words, he likes chatting as long as he is a girl.