this sentence contains only eighty percent of all possible vowels

Recently, I learned about a type of writing called the lipogram. The basic concept behind the lipogram is that the author entirely omits either a single letter or a group of letters from his/her text. Obviously, lipograms tend to take the form of poetry- a medium accustomed to serving as the casualty of linguistic experimentation. Some braver writers, however, have ventured into the realm of lipogrammatic novels.

Courtesy of my friend Jatin who located this poem, here is an example of a lipogram:

A jovial swain should not complain
Of any buxom fair,
Who mocks his pain and thinks it gain
To quiz his awkward air.

Quixotic boys who look for joys
Quixotic hazards run;
A lass annoys with trivial toys,
Opposing man for fun.

A jovial swain might rack his brain,
And tax his fancy's might;
To quiz is vain, for 'tis most plain
That what I say is right.

[**Note: This poem also happens to very nearly be a pangram. While it completely omits the letter E, the author manages to use every single other letter of the alphabet at least once. While this comes as close as possible, a perfect pangram could never also be a lipogram, obviously.]

The univocalic is variation of the lipogram in which the author only uses one vowel. Here is an example of a univocalic:

Incontrovertible Facts
by Charles Bombaugh

No monk too good to rob, or cog or plot.
No fool so gross to bolt Scotch collops hot.
From Donjon tops no Oronooko rolls.
Logwood, not lotos, floods Oporto's bowls.
Troops of old tosspots oft to sot consort.
Box tops odd schoolboys oft do flog for sport.
No cool monsoons blow soft on Oxford dons,
Orthodox, jog-trot, book-worm Solomons!
Bold Ostrogoths of ghosts no horror show.
On London shop-fronts no hop-blossoms grow.
To crocks of gold no dodo looks for food.
On soft cloth footstools no old fox doth brood.
Long storm-tost sloops forlorn work on to port.
Rooks do not roost on spoons, nor woodcocks snort,
Nor dog on snowdrop or on coltsfoot rolls,
Nor common frog concocts long protocols.

Whilst contemplating the deeper meaning of this sophisticated art-form, I decided to write my own lipogram/haiku, which omits the vowel U:

sometimes i wonder
why people do what they do...
like write lipograms

***

And, for a bit of fun, check out this random haiku generator