Am I dumber when wearing a helmet? Hard to say as a helmet actually saved my life. Sure, for years I did not wear a helmet. Not on my bike or my motorcycle. Its because the feeling was so good. Almost euphoric. But in actual reality, a helmet did its purpose...

Long Story 2013:
3 Sec. Bicycle Verses Feral Hogs - Near Miss UNIVEGA ChroMo
Then again, there are other helmets. Yep, we fight the way we train...
Long before my Active Duty time...
Let me see, 360° view, radar approximation of approaching vehicles, terrain features of on coming vector, vitals monitor with Vo2Max, GPS locations, offensive armaments disabled, and of course Led Zeplin. Now thats a bike helmet for sure...