What happens to flexibility as we age?

Yes, that would be a question for someone my age. Here's what I read at one site on-line.

"You guessed it. It decreases. The good news is that some studies, but not all, show improvements in function when individuals engage in exercise programs that involve stretching exercises. Unfortunately, the studies on flexibility in the aging population aren't as complete as they are for studies of strength and endurance, but the studies do suggest that significant improvements in the range of motion of various joints (neck, shoulder, elbow, wrist, hip, knee, and ankle) can occur when stretching exercises are prescribed. It's just that it isn't clear how much flexibility training older adults should do to maintain good range of motion, function, and health."

My dear husband and I like to save money and so every 2 years we take a defensive driving class on-line for a discount on our car insurance. This year about an hour of that class dealt with the importance of flexibility when you drive and they went through a variety of stretching exercises old people (or soon-to-be-old in my case :) should do every day. I have my good days when I do some good stretching but  then I can go weeks without doing any stretching at all. So  this month's competition has been good for me. My goal is about 10 minutes a day--not enough to stretch all those body parts listed above--but I get to all of them over the course of a week. 

I'd love to hear how some of you fit stretching into your busy days and what your favorite stretches are to do.