One of the greatest '60s folk songs ever --
by the Kingston Trio, I believe?
Seriously --
they do happen still, but you're right....it is rare these days. Most likely because more tops and dresses
can be fitted with inserts that didn't exist before, so even when a woman isn't wearing a bra, there's still concealment.
That said, there are hundreds of examples here on WWoW alone, so rest assured if it happens, it'll show up here
search.php?keywords=pokies&terms=all&author=&sc=1&sf=all&sk=t&sd=d&sr=posts&st=0&ch=300&t=0&submit=Search.