Hard for me to get wet..sorry if TMI

me and my SO have such an amazing sex life..sometimes as much as 5x a day! We've almost been together for a year now and I know it's probably normal but I can't always get wet for him! Is there anything I can do to help that? I'll usually give him a quick BJ to get him lubed up for me, but I'd like to be able to get wet for him too..tips?!