Maybe it's a cultural thing but here in the UK at least I think male and female are seen as genders... What word should the parent commenter have used? "man gender" is not grammatical, so I can only think of one other option; "male".
(edit: and in case I'm misunderstood, I don't mean any kind of subtext on the wider debate here, I'm just asking because I think 'male' is a gender and am confused).
(edit: right, found this: http://www.med.monash.edu.au/gendermed/sexandgender.html so basically it's the difference between sex and gender. I wasn't acutely aware that the words male vs masculine carried such an important distinction. I'm not sure if they are commonly used in that distinct way).