Bandana Metal My Son Is Running Around With A Green Bandana In His Backpocket - He Is A Thrash Metal Fan. What Can It Mean?

My son is running around with a green bandana in his backpocket - he is a thrash metal fan. What can it mean? - bandana metal

I have an eighteen, which a big fan of thrash metal - the hair has grown, Bart Ambrose has a strange and bizarre acts in general. What could the cloth hanging from his back pocket mean? All references that I found is gay, but I'm pretty sure that it is not.