"Now, Jasper, I'm a-gonna sit down and have me a drink."
"But we's privates," says Jasper.
"You blind, boy?" asks Leroy, pointing at his stripes. "We's sergeants now."
So they have their drink, and pretty soon a hooker comes up to Leroy. "You're cute," she says, "and I'd like to date you, but I've got a bad case of gonorrhoea."
Leroy pulls his friend to the side and whispers, "Jasper, go look in the dictionary and see what gonorrhoea means. If it's okay, give me the okay sign."
So Jasper goes to look it up, comes back, and gives Leroy the big okay sign.
Three weeks later Leroy is laid up in the infirmary with a terrible case of gonorrhoea.
"Jasper," he says, "what fo' you give me the okay?"