Try to take pleasure in what his singing* brings to him, rather than what it brings to you.
*or piano playing, or poetry reciting, or woodworking, or painting, or ...
There is evidence that the original spelling was ya'll. The spelling of ya'll could have originated from the contraction of ya-all because ya was a common spoken slang form of the word you. 19th and 20th century authors like William Faulkner, Ernest Hemingway, and Carson McCullers used ya'll. Though becoming less common, the spelling of ya'll is still used within the Southern United States.
I have discovered no support groups for this condition but did run across a boisterous conversation on the subject at the blog site www.metafilter.com. There was input from men and women, including one woman who said "it's trial and error" every time she turns on a water faucet, and a guy who says he's clear which is which unless he looks in a mirror.