Ok I can't believe I am actually going to post this

, but I'm seriously wondering about this...
I have never sent a "dirty" text message and when I first read this thread I didn't think too much about it. But now that I've had some time to think, I'm wondering...what qualifies as a dirty text message. Sorry if this is a really stupid naive question and I should just know...but I mean like honestly, I can't think of anything you would say over a text message to somebody that would be considered dirty and they wouldn't look at it and just laugh hysterically. I don't want details or anything, but just a vague idea to help me understand this concept.
And now you can all feel free to go laugh at how sheltered and naive I am.