There are lapel pins custom that can be worn by anybody. I actually like those custom pins that shows support of some cause.
There are different reasons why men and women wear lapel pins. In some cases it is purely ornamental but in some it indicates the wearer's affiliation with an organization or a cause. It is also worn for business purposes. For business use, lapels are worn to designate achievement and membership. Some business entities, award lapel pins to their employees to boost employee morale and productivity.