How to bring out a freaky side of him??!

So my hubby and I have been together for 5 years. The sex is always fantastic but being 15 weeks pregnant I’m ALWAYS in the mood. He is way more shy than I am and I just KNOW there’s a freaky side to him. How do I unleash this and how to I start sexting him? He’s out of town for work for a few nights. This is about the ONLY thing I’m shy about. (Weird I know)