How can i talk dirty to my girlfriend over text?

So basically I would't mind doing so with her but im not gonna lie since we've been dating i've never been really able to tell she was about all that😂. Because she would always talk sort of differently with me. Well i wasnt home all day because I had a basketball game so i couldnt talk to her and i got home at 10:30 to talk to her and one of my friends which is also her friend sent me pictures of their conversation while i was gone and my girlfriend said things like "why won't he answer ugh i want his d***" And she also told my friend if she ever sent me nudes i wouldnt really care or anything, id be dry (NOT TRUE THO). Then she said "yo one day when i suck him off, i dont wanna swallow". Honestly, i never bothered talking alot dirty to her because from the way she talks to me it seems like she isnt about all that. So how can i instigate such conversation with her? Oh lastly, while i was gone my girlfriend sent me messages like "Babe give me ur attention, babe pls, i want uuuu... not like sexually, But doesn't matter " if i read that last message in time what do you thing would be a good response to that so we can talk dirty to eachother? I know, i know i sound really stupid but im desperate!!