I think one of the biggest problems is core strength and people lead the wrong way often from the arms! leading is guiding someone round the floor not pulling or pushing them and sometimes this is confusing to beginners
You've got it. Nothing worse than the grasping man. However, if you ask them why, its because they feel you are going to run amok
The way to cure it is to dance with only one arm (man R, lady L). Both partners have to learn to use their bodies and ballance correctly to not pull away.
Its become part of our regular practise