What is the meaning of a male left nipple piercing?

Look it is simple, male nipple piercing is much more painful than female nipple piercing due to the body structure. This whole bit about right meaning something and left meaning something is just urban legend BS there is no meaning to the location or number of piercings a person has regardless of gender. Some people are left handed and some are right handed of these people most are right hand dominant. The body is protective of the left hand side of the body, which is to say the body feels more on the left hand side. Most piercers are not aware (or don't ask about right or left handed) of this side dominance when they do the piercing. Right handed males tend to get piercings on the left side so it doesn't inter fear in there day to day routine as far as discomfort goes during the healing process.