^ And I forgot how many very big insects I had to remove from the helmet visor. This kind of thing in one eye should suffice to lose the control of the bike and have a taste of how abrasive is a road.
And I don't know if it's like here where you live, but here near Chiang Mai in this season there are a lot of small grapes of very small insects flying everywhere. If you ride the bike without helmet and visor you can barely open your eyes. I always thought eyes are very useful for riding.