2017, Garrard Conley, Boy Erased: A Memoir of Identity, Faith, and Family[1], →ISBN, page 113:
lowered my face to the keyhole fly of his cotton briefs
2017, Alan Pinkett, Utta Drivel Goes Forth[2], →ISBN, page 164:
“They didn't have the ones I normally buy and the best I could find were similar, but with what they called a keyhole fly. A keyhole fly! What sort of man is going to buy underpants with keyhole flies?” “You, obviously!
2021 July 19, Tammy Tilley, “The best cotton underwear”, in Chicago Tribune:
These mid-length style boxer briefs have a 6-inch inseam and a keyhole fly design. They are made from 100% cotton.
