Dirty talk!! lets me mature pls!

Okay so I've been with my hubby 8 years and we have 2 beautiful kids! Ever since we've been together I've made sure to try new things to keep thay flame going, but 1 thing i want to do is talk dirty! I mean i know that would totally turn him on but i am way to shy! I want to start of by texting and hopefully being able to do it in person. Any advice on how to start? And please be mature about the subject. I mean we're all adults here