A male personal assistant who accompany some-one and knows her/his boss's interests and needs and responds to them.
"Mr. Obama's regular basketball buddies include Reggie Love, the candidate's "body man
" from the campaign trail who played basketball at Duke University in 2001, the year the Blue Devils won the NCAA championship...." (Wall Street Journal online article: http://online.wsj.com/article/SB122964718901120311.html?mod=yhoofront)
"Mr. Love, 26, is Mr. Obama’s body man
, the personal aide who shadows the senator and anticipates everything he needs — and everything he does not need. He is not a bodyguard (security is provided by the Secret Service), but rather the ultimate assistant, rarely more than a body length away from the candidate" (http://www.nytimes.com/2008/05/27/us/politics/27reggie.html?_r=1&oref=slogin).