Didn't realise that house cats could be male until I was at a friend's house and said 'bill' was a strange name for a cat. I was 15. I still cringe thirty years on.
"Singin' the blues
While the lady (house) cats sigh,
'Wild Stray Cat, you're a real gone guy...' "
@daburudar @fesshole certain cat variants are almost always female. Perhaps the OP half remembered an adult explanation.
https://en.wikipedia.org/wiki/Tortoiseshell_cat
Also, there are plenty of all female species, that reproduce by cloning. It even happens on occasion with species that have males.
https://ocean.si.edu/ocean-life/sharks-rays/parthenogenesis-when-female-sharks-reproduce-without-mate