A thing I've noticed - and it's not a recent development, meaning I noticed it fairly early in my life - is that men often don't get interested at all in singing till they ARE men - boys don't see it as a masculine accomplishment, so unless they just happen to be unusually fond of singing, it's not something they pursue. So, if they decide, as men, that they want to sing, they have a great deal of catching up to do. Same would apply to dance - and no doubt various of the other gentler arts and pursuits.