Guys who don't wear plugs haven't considered the long term effects of bike engine and wind noise...look up the word tinnitus. It is no joke man. People who are around harsh noise for many years develop it. It is very unpleasant and there isn't a thing the doctor can do for you. It is a ringing sound in your ear that you perceive to be there but there is no external object making it. Many guys who work around loud equipment, guns, and race equipment guys can all attest to it's damaging effects to one's psyche. Try going to sleep while you perceive someone is laying right next to you whistling and you might begin to understand how much fun that would be. Protect your ears...u nay sayers have been forewarned...