lol it's probably to keep their hair from flying around or something...

I have worn a motorbike helmet just for laughs once, got some attention like!! This was at midnight on a saturday night driving around town with roof down also.... mates filmed it. Sad times...

 

If I had a Berlina I'd rock a Darth Vader helmet.

 

I used to wear a helmet every now and then as a joke... That was back in the good ol' days when I didn't have to daily drive my S2K.