If you asked my "powerlifter" weight training coach he would say,"It shouldn't be done by men but if you feel it's necessary make sure to do it in a very dark room with the door loked and miles away from anything living." This from the guy who says "you don't need to stretch. It just makes you more flexible..."
But for real I am on a yoga for stretching program since tearing my calf and soliel muscles. I use it as part of my warm up and cool down routine along with my body weight exercises like push ups, crunches, body weight squats, etc.