Yes, they were pretty grandmotherly from our post-modern perspective, but, as evidenced by this photo, the suits generally did not incorporate the bra insert that later suits would feature. So, men back then could reasonably expect to see how robustly a young lady was equipped in the baby-mouth-access department. And, imagine how much that was enhanced when the suits absorbed some water.
Oh, yeah, things were pretty sweet back then, in some ways.
Many Thanks to Hoodoo That Voodoo