Double post.
I don't even have to look at my phone to use Siri, either.
example:
I was lying in bed.
I put my headphones on, held a button on the cord to open Siri, and this is how the conversation went.
"Siri, send a text to Sophia."
"Okay, what would you like it to say?"
"Hey."
"I've updated your message. Ready to send it?"
"Yes."
"OK. Sending now."