While most of the children in America are being raised in a two-parent household, single-parent households are the second most common, with single mothers being the majority, and with the rise of more same-sex adoptions, there are a lot of dads as full-time or part-time custodial guardians of young, cis teenage girls. Er, that is a bit convoluted - dads being a subset of a subset of a subset. And I think they've got their cs in a twist there, it's girls* who menstruate, no matter how they 'identify'. That would be biology at work.
And as far as this is concerned Periods can sometimes be really difficult for fathers
ffs. If I was a father this sort of woke nonsense would embarrass me.
My father had no issue buying me sanitary products when I was living at home, some 30 years ago now. He was a terrible father in almost every way JessicaWakefieldSVH same with mine, never had any trouble with the nuts and bolts of biology, talking about periods etc but also was a terrible father and hated women.