Ah!!

Childhood games....  nostalgia!!

Doctors and Nurses, when I played, it was usually   "Patient & Nurses"

Coalman's Knock, .. like Postman's Knock, only dirtier.

Blind man's buff or blind man's bluff is a children's game a variant of tag. The traditional name of the game is "blind man's buff", wherein the word buff is used in its older sense of a small push. The game later also became known as "blind man's bluff"

Blind man's buff is played in a spacious area, such as outdoors or in a large room, in which one player, designated as "It", is blindfolded and gropes around attempting to touch the other players without being able to see them, while the other players scatter and try to avoid the person who is "it", hiding in plain sight and sometimes teasing them to make them change direction.

Girls can be devious, I was always "it", and they told me I had to be "it" in the buff, because that is why it's so called.