Sometimes, yeah. My dad does it
all the time and it's hilarious. He's even sang in his sleep (Row, Row, Row Your Boat, and What's Love Got To Do With It
). Sadly I'm not that good.
Once I slept over at my friend's house and when I woke up the next morning, she wasn't in her room. So I found her and she said I was talking in my sleep. She told me I went, "I told you so!" (I had warned her I talk in my sleep
) and that I muttered other stuff.