How to pronounce 男生 in Cantonese (5 out of 6):

當然 這是男生們做
Of course, it's what boys do.

Cantonese Sentence Breakdown

當然 dong1 jin4
(adverb) absolutely
這是 ze5 si6
this is
男生 naam4 saang1
male student
mun4
suffix for plural form
zou6
to do
to make
to produce
to write
to compose
to act as
to engage in
to hold (a party)
to be
to become
to function (in some capacity)
to serve as
to be used for
to form (a bond or relationship)
to pretend
to feign
to act a part
to put on appearance
to fight
to kill
to trick
to have sex