are you kidding? we love doing that sh*t. but we usually don't give advice unless you ask for it,since we think you'll be insulted,so just ask them. and always listen to what we're saying,we give little hints here and there,i once told a guy he looked cute in a sweater-didn't take it off for a week and girls were all over him.
I definitely would be willing to help him! Never really thought about it because I assume most guys wouldn't want advice, just comfy in whatever they're wearing. That would be a lot of fun to shop with him and help him find a style he likes