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Not sure what a gun pervert is but if I had to guess I'd say it was a social supremacist that thinks everybody else should be disarmed except them. The first one is idiotic, the second one got a chuckle (but has nothing to do with guns), the third not about guns either (???), but kinda sad when put in perspective.
To be funny it must be based on some form of honest reality. For example; What are gun nuts? The place where you kick a gun that hurts the most after they jump out of the gun rack and go postal.