What is it about the late 1960s that produced a fad for bleating lamb singers...???

Marc Bolan, Roger Chapman, Ray Dorset.. immediately spring to mind...

All 3 are singers I happen to like.. but it is a bloody odd singing style..
Which I don't really understand the appeal of...???

I'm sure you can add to the list...

[apparently at least one prominent folkie...???]

But was it just a late 60s / early 70s fashionable affectation..
Is there a new younger generation of lambsingers still bleating away amongst us...????

Baaaaaa...