No matter how hard I try I can never seem to get my earbuds to insert equally between both ears. The right ear fits just fine, but the left ear always tends to get loose. This happens on all my earbuds I've bought over the years, I can never get a full stereo experence out of them and it's annoying because I'm a very critical audio enthuseist. Is it possible my ears could be asymmetrical? Is this normal?