I asked my wife to do this the next time she saw me with morning wood (I always sleep naked). She did it, but just once! I LOVED it!
One of the best mornings ever.
She says I look so peaceful sleeping that she doesn't want to disturb me...and I say PLEASE disturb me!
She's usually got to run to do something for work, anyway, but I hope she'll do it again sometime soon.
I tried waking her up once, but she's so sensitive she woke up when I first touched her. She did still enjoy receiving morning head, and I have repeated that many, many times since the first time.