Re: Because skiing or snowboarding aren't dangerous enough already?
totally agree for riding a bike etc
Depends on the type of motorbike (and whether it has a fairing or not). I guarentee you that, on an unfaired bike and doing more than 50mph, you won't hear other vehicles around you anyway because of the wind noise round your helmet. And a lot of bikers tend to wear earplugs anyway - especially if on long rides (to stop long-term hearing loss from the wind noise).
And it beats hearing the sound of your own voice singing to you in order to stave off boredom..