Is it normal that my bf has sex dreams every night?

My bf has sex dreams every single night. He moans in his sleep and makes moves like if he was having sex with someone. I don't know what to think... Does this mean that he is not satisfied with our sex life? I have no complaints on my side, I am pretty happy with everything and I really wanna make sure he is happy. I tried talking to him re our sex life. I asked him if there is anything he is not getting, he says that he is pretty happy, he just wants me to take more initiative. This question is mostly for guys. Can you share your experiences. What is the reason behind this? If you do experience the same, are you missing something in ur relationship? Thank u in advance for ur help.