We all have patterns while texting. I remember when I was in college, I had made a new friend, she was the 'monitor' of the class, yes, we had monitors in college as well.

Back then, we didn't have whatsapp, so we were texting. She never responded to texts during lecture before that day, so I was shocked.

Then, one message later, I realized that it was someone else using her phone and fifteen minutes later, I said, "If you are done, please give her phone back to XYZ"

Reminds me of my Swedish friend who spoke like an American until he gave himself away when ordering food at the restaurant.

He'd say "I order the fries" to the waiter.