dirty talk and sexting?

Sophie • 19 years old, still figuring out life
So me and my man have been together for over 2 years, and we're having sex regularly, although it's all predictable.. how do I introduce dirty talk without feeling stupid.. also, ever so often he goes away with work or we can't see much of each other because we're both working a lot, but on the evening I now and again hint for sexting etc.. but he doesn't really get into it half the time he makes a joke of it, how can I low key ask him what he thinks of the idea, we've done it properly once and it was great but we haven't since .. 🤔