What Is It About Mini-Meat that Causes Endorphin Attacks?

Jack in the Box's mini sirloin burgers ad has compelled at least two of our local friends to actually try the wee bready buggers. Every time it hits the TV, somebody within proximity has a cuteness explosion and shrieks something to the effect of "The COWS are MINI! Because the BURGERS are MINI!", their pupils all dilated and whatnot.

It's weird. But we conveyed a similar reaction when we watched South Park's "Fun with Veal."