4. Compliment his body type and recommend clothes that would suit him, like “You would look good in XX because you are well built/slim.”
“He wouldn’t feel bad to be flattered. The trick is to use it as a way of encouraging him in the right direction.” This comment is used to suggest a different kind of style, while stroking his ego. Clearly, this would work only if he is somewhat confident with his body. If he is slim, be careful, as he might be anxious about being too thin.