A Gender Mereologist: is concerned with the state of being male and female (particularly with reference to social and cultural differences) within the wider context of being human.
A Bloke Gender Mereologist is particularly concerned with the state of being a man. He will have a conscious and unconscious bias towards perceiving the human experience from this perspective. He is also only human.
Gender Mereologists believe that gender equality is most effectively championed by a holistic acceptance and understanding of men, women and diversity, as opposed to the more reductionist outlook often adopted by male and female rights activists.