John Mayer's known as a trend-setter in some parts, therefore our editor, Stephen Lawson, had no qualms about getting in on the Mayer-thong action (original story here). In particular, note the Ron Burgundy eyebrows. He may just gain the coveted (and newly-invented) title of Mr Total Guitar for this act of fashion heroism.
The Mayer-Thong: For Work, Rest And Play
By the way - in case you were wondering - yes, Steve does wear all of his clothes when he swims.