Honestly, I'm with OP on this one. No matter how much you say no dick/hc on /gif/ a dick always shows up. Here posts with dicks in them get deleted.
As for the fear of penis? I can't speak for everyone, but I would just prefer not to see a penis if I don't have to. It's not like I start puking uncontrollably if I see any penis besides my own, but I certainly see the appeal of a gif thread on /s/.