Thanks for sharing. Part of your post clued me into why my 23 year old cat maybe making loud, long, meows. You said male cat's do this when they are groomed? My cat can't groom herself so I do it for her. It makes since now that when I get a little behind on the grooming she makes these...
My cat is 23, white, short hair domestic. Needless to say I have her spoiled. I know she wants something from me when she does this long and loud meow that sounds like she needs medical attention now!(and I consider that). She even strolls into the bathroom to make a louder meow! Seriously...