boys are usually prettier aren't they? maybe you're subconciously sexually discriminating against the drab females.
edit: out of curiousity who would hate a fish? I can see some people being cruel to them or even killing all of them for a profit but why would someone hate a fish? well now that I think about it maybe a shark ate my dog or something. Then I might not be to fond of fish. But I don't think that would make me evil.
I think I just might overanalyze things.