California is the only place I've ever been to that allows it. I understood that the guidelines told me I wasn't responsible for the motorcyclist, but that didn't help me put my guard down at all. My need to constantly assume the responsibility of other road users is part of the reason I hated driving, and why I'm so relieved to live in a place where I don't feel I have to drive.
I'm not sure about Sweden, but here in the south, motorcycles are really uncommon, even more uncommon than cars. I also won't have a car here, and don't even have my bikes yet!