The sergeant orders ten shots of tequila. The corporal is about to order the same, when the sergeant says, "Are you sure about that?"
"Of course I'm sure!" replies the corporal. "I am no longer a private. I am a corporal now!" So the sergeant lets him order ten shots of tequila.
Afterwards, the two men walk drunk out of the bar and run into two prostitutes, a blonde and a brunette. "Hey!" say the prostitutes. "Wanna have a good time?"
"I would!" says the sergeant. "Me too!" says the corporal.
"Are you sure about that?" the sergeant asks again....