My father hated the idea of me joining the army. He always said it wasn't a suitable occupation for the fair sex.
idiomthe fair sexwoman an old-fashioned expression meaning women, that is often used humorously:The rugby team had to admit that what the fair sex lacked in muscle they made up for in guile.There's nothing fair about today's fair sex, as they sit in the pub, shattering the air with their foul-mouthed shouts.I have always maintained that women, not men, are the unfair sex.