Acually by that logic the more shit you stuff under the helmet the less loose it is.
And you're right, there are advantages.
A) you can take off your helmet without having to take off your goggles with it
B) you don't look like a tool
I knew all the pro's were on to something
Surely the helmet wouldn't be loose if it fits right in the first place?
I've never actually noticed how anyone else on the mountain wear their goggles. I wear mine over because I like to lift them quite regularly.