Dogs make gross sounds with their mouths.

Dear reader, you may not have noticed it, but—if you listen—you will realize that the sounds dogs make with their mouths are, more often than not, very gross.Don't believe me? Well, you'll see . . .

Κύνες ἀηδῆ φωνὰς ἐκ τῶν στόματων ποιοῦσιν.—Homer

Translated, this means, "Dogs make gross sounds with their mouths." I hope this convinces you at least of the antiquity of this sentiment. But, in case this attestation is insufficient, read on . . .

Canes turpes sonos ex ore faciunt.—Juvenal

This, from one of the Roman poet's lesser known works, conveys the same idea as the storied Greek bard.

Upon a quiet morn, with pen in hand,
I sit to craft my verse, both pure and true,
When from my loyal hounds, a sound doth land,
Disturbing thus my thought, my muse to rue.Their yaps and barks, like tempests in my ear,
Do rend my concentration thread by thread,
No ink from quill can flow, no words appear,
For each foul noise doth fill my heart with dread.Oh, how their gross cacophony doth vex,
A symphony of chaos, loud and shrill,
My sonnet's birth, it seems, is now annexed,
By canine clamor, my good will to kill.So here I sit, a poet vexed by sound,
My dogs, alas, my wit and peace confound.

And, speaking of a bard, take this apocryphal sample from THE Bard, who, in the most exquisite renderings of our tongue, show how these sounds may shock the sensitive soul.