I don't believe for a second that you have male friends that said your knowledge of football is good, unless: A. They are mentally retarded B. Homosexuals with no interest in football C. Are trying to shag you, probably to shut you up for 2 mins.
It's well known I like United (I don't care what anyone else thinks) and if relations between the clubs where amazing I still would never entertain wearing a United top at Ibrox or vice versa. If you are going to see a team you support why wear another teams top? It makes no sense. You get slated on here because so many want to buy into the whole Rangers Chelsea lovefest. Some of the same who slate me for liking an English club. It's OK though it's good old Chelsea.