create alias mlm (0) -> male/male (493095)
create alias wlw (0) -> female/female (100634)
create alias male_x_male (0) -> male/male (493095)
create alias female_x_male (0) -> male/female (654873)
create alias male_x_female (0) -> male/female (654873)
create alias female_x_female (0) -> female/female (100634)