It does not affect your daily life very much if your neighbor marries a box turtle. But that does not mean it is right. . . . Now you must raise your children up in a world where that union of man and box turtle is on the same legal footing as man and wife.
Apparently Cornyn had the good sense enough to recognize that the Republican obsession with interspecies sex is probably something best kept quiet and he didn't deliver the line, but it was in the prepared speech.