Always sex

Me and my boyfriend have a great relationship, but whenever i stay over we always have a lot of sex. We'll watch movies and smoke weed and chill but will never make it through a movie or show without having sex. He really cares about my happiness, so i know if i tell him i don't like something, he will stop. But i don't want to be rude. I enjoy the sex but i wish we had a more casual relationship. More like the sweatpants and baggy t shirts and lazy days kind of relationships.