male -- keywords

(man OR men OR gentlemen OR gentleman OR male OR males OR husband* OR father* OR son OR sons OR grandson* OR nephew* OR step-son* OR “step son” OR “step sons” OR stepson* OR step-father* OR “step father” OR “step fathers” OR stepfather* OR father-in-law OR fathers-in-law OR “father in law” OR “fathers in law” OR monk OR monks OR widower OR widowers OR bachelor* OR uncle* OR brother* OR step-brother* OR “step brother” OR “step brothers” OR stepbrother* OR grandfather* OR grandpa* OR paternal OR paternity OR fatherhood OR inseminat* OR semen OR “seminal fluid” OR “seminal vesicle” OR “seminal vesicles” OR testic* OR testes OR testis OR scrotum OR scrotal OR prostate* OR “vas deferens” OR seminiferous OR penis OR penile OR circumcis* OR circumciz* OR orchiectom* OR vasectom*)

for male children include
boy OR boys

when searching for articles about adult males, also consider ORing in:
king OR kings OR duke* OR prince OR princes