From page 355 of George Crile’s book Charlie Wilson’s War:
Eventually the Mujahideen were moving their supplies on the backs of Tennessee mules, and the halls of Langley were soon filled with rumors (later confirmed) that the freedom fighers were copulating with these animals.
In an attempt to paint a bright face on this curious practice, Avrakatos explained that in Greece and other Near Eastern cultures there is no scorn placed on buggery as long as the person in question assumes the right position. "The key question is whether you are the f—er or the f—ee," he said. The Mujahideen were taking the dominant role here; thus by their code of honor there was no need for shame…
Fred emails: “This lends new meaning to the phrase “piece of ass”.”