I tend to Agree with MSRkz. There names seem to cause a general misconception among a lot of aquarists, in the past I have kept males in with other males, no problems, most males infact, I find are quite placed.
I hate to tell you this, but alot of fish, not just fighters "can" cary bug's and bacteria. This includes Discus. Thus the reason for qaurintine
Shae