2nd team?

Just interested to see if any of you on here follow a 2nd team after the Boro. I am a mackem who also follows the Smoggies as my second team, the reason being I used to work in Acklam and loved the banter and came to quite like the Smoggie people. I know it's not the done thing and to be honest liking Sunderland and Boro seems to just double the misery. So simple question, do ya follow a 2nd team and why?