I do not know what this means, but I find it gross just the same.  Joe explains:

Maryland-based carpetbagger Bishop Harry Jackson appeared on the radio show of Minnesota hate preacher Bradlee Dean to declare that gay marriage is part of Satan’s plot to “destroy our seed.”

I had no idea wingnut seed was so weak, the motility so pathetically low, that the nice gay couple down the street sealing the deal legally would kill it.