Bilingual humor may be viewed as a relatively benign response to the frustrations inherent in living in such a linguistically and racially heterogene… - James Alan Matisoff

Rhinoglottophilia–an affinity between the feature of nasality and the articulatory involvement of the glottis–is more prevalent than is generally realized. Although it sounds like a disease, or even a perversion, rhinoglottophilia is actually quite a benign and natural condition. It is of interest chiefly because it is not obvious why there should be such an affinity at all.

In the Beginning was the Sino-Tibetan monosyllable, arrayed in its full consonantal and vocalic splendor. And the syllable was without tone and devoid of pitch. And monotony was on the face of the mora. And the Spirit of Change hovered over the segments flanking the syllabic nucleus.
And Change said, "Let the consonants guarding the vowel to the left and the right contribute some of their phonetic features to the vowel in the name of selfless intersegmental love, even if the consonants thereby be themselves diminished and lose some of their own substance. For their decay or loss will be the sacrifice through which Tone will be brought into the world, that linguists in some future time may rejoice."
And it was so. And the Language saw that it was good, and gradually began to exploit tonal differences for distinguishing utterances – yea, even bending them to morphological ends. And the tones were fruitful and multiplied, and diffused from tongue to tongue in the Babel of Southeast Asia.

The severe difficulties in attempting a rigorous reconstruction of Proto-Tibeto-Burman on this basis [of scant data] have not prevented certain hardy souls from leaping to ever more far-flung comparisons (particularly of Tibetan or Burmese with Old Chinese, or even with Thai) in an attempt to say something about the great Sino-Tibetan proto-language. There are no doubt those who would have tried to reconstruct Proto-Indo-European simply on the testimony of Provençal, Avestan, and Old Norse. We are only now becoming more realistic. It seems wiser to concentrate for the time being on reconstructing PTB sub-group by sub-group...