(Not my own joke.  Reposting from another source, with civvie terms replaced by TER terms.)

Two men are talking.  One of them says: "Hey, listen to this!  I just opened a new brothel."
His friend answers: "No way!  What do you charge?"
"Very reasonable.  HJ is $20, BBBJ is $50, Greek is $100."
"What about FS?"
"Well, the thing is, my business is very new, so I still run the whole operation by myself."