Sometimes l will fall asleep whilst watching the news at night, but not for very long. It is more just feeling drowsy and closing my eyes. I don't breathe like I would when asleep. It is usually the only time I stop all day, so the body takes the opportunity to rest.
I have on the rare occasion fallen asleep while watching television. It really depends on my work load and which day of the week it is. By Friday I'm more worn out than on a Monday.
I'm glad that my husband usually stays awake to fill me in on what I've missed!