Update on photo
The caption with the photo from The Graduate in TICB (p. 147)points out the awkwardness that may lead to indirectness--Benjamin calls the woman he's having sex with (who is also the mother of the woman he loves) "Mrs. Robinson". Notice that in Desperate Housewives the teenage gardner, John, does the same thing and calls the woman who employs him but with whom he's also having sex, not Gabrielle, but "Mrs. Solis." Though no photo appears in Messages, the example works with the discussion of directness.