Thinking and posting about the Shaggy Dog led me to plunder threads posted on The Wardrobe about Cheever, his Shetland sweaters and his shirt collars.  The one in, one out look rather reminds me of my wife, who, when lying on her side, sometimes has one tit flopping out.  Having shared that with your good selves (too much information?) I have to say it's a look I could grow fond of during the autumn and winter months: crew neck, one in, one out (or unbuttoned, both out), topped off with a pea coat on the colder, damper mornings.  Alien!