I know, my thoughts exactly... One of our neighbors was killed just last fall in a motorcycle accident. He was an older fellow, retired. He liked to ride the back highways for fun on his Harley, sans helmet of course... He had a collision with a good size deer with a full rack of antlers. I won't go in to gorey details, but let's just say the deer had to be transported with the victim in the ambulance... The doctors said he could have been saved from the deer impalement, but the back of his head was mush from the fall, so no recovery possible there. He died the next day.
Deer vs. Motorcycle is not an uncommon accident here in Arkansas. We have a huge population with very few natural predators. Despite our hunters best efforts, the deer population is always "healthy" lol. They run down my road and I'm only about 8 miles from our largest city. There's a city park right on the edge of town that connects via private property and federal land to wilderness areas that supports a population of 50-75 deer. They'll come within about 30 feet of people. They've learned we're not allowed to hurt them in the park, lol.
Anyhow, I digress. There are other states without motorcycle helmet laws as well. Colorado, Iowa, New Hampshire, and Illinois have no helmet laws at all, any age of person can ride a motorcycle without one. Here's a web site with the details (caution, the web site is anti-helmet, lol). 50 State Helmet Law Review
This site says only IL, IA, and NH are helmet law-less, so the above link may be outdated. Current U.S. Motorcycle and Bicycle Helmet Laws