War Play and Rough & Tumble Play – do they have value for adults?

When I first heard the term “war play” I was repulsed and unsure what it encompassed. Had I ever played like that as a kid? Do I today? What about rough and tumble play? This sounded like fun, but ….These issues often come up for parents and educators with respect to childhood play and they can be controversial. But, are these types of play worthwhile for adults?