...I had this friend who had serious trust issues. He totally trusted his wife, could never imagine her cheating(she's an angel really), but he was a serial womaniser and distrusted everyother person in his life, from his friends, brothers, to his staff, colleagues even to his girlfriends. ...............

Difficult to understand.....I think people who seem to have serious trust issues expect others to do what they would have done. .......Simply put, they expect to see their reflection in others