It all goes back to the Battle of The Alamo, when Santa Anna defeated the Texian defenders through the cunning use of dolphin-shaped silicone vibrators and novelty latex fetish wear.
The Texians' resultant immense and impotent fury, vaguely focused towards Brown People in general (and legitimate regional sovereigns and governments in particular) has lingered ever since.
To this day, Texans instinctively burst into patriotic song and/or hives when within 300 feet of a dedicated sexual aide, or 50 feet of common household objects that have been improvised into such a role, and have been known to spontaneously combust upon contact with anal beads.
However, in 1973 during a freak pudding accident at the Capitol Building, it was inadvertantly discovered that Texan Lawmakers possessed a strange supernatural protection from the ill effects of these objects. Believed to be a divine gift from their LORD and savior, Ross Perot, this newfound immunity allowed them to personally begin the process of reverse engineering the foul weapons of their most hated enemy in the hopes of one day turning them against their creators.
Yet despite their best efforts in the intervening decades, progress has been slow. Without a viable countermeasure to the so-called "Sexican" menace, in recent years Texans have been forced to wall off their border and station armed patrols in a hopeless attempt to stem the tide of coital fluid long enough to complete a working prototype. But with the combined forces of Obamacare and The Homosexual Agenda harassing them on their northern front as well, they may already be too late...