The problem with this question is it will never be a normal debate.
For those who DO support two teams (for whatever reason), the answer will be yes, because they understand how it works.
For those who do NOT, they will answer no....because they can't understand it.
It's like asking someone...
It's "possible" because I do.
Am I ashamed of it? No.
My story is a case of initial peer pressure. I'm 28 and when in year one (so six years old) I wore my Brighton shirt into school and wore a head band to be Steve Foster. I remember being MOCKED whilst the rest of the boys wore Man Utd...