One strength of the social constructionism approach is that not all cultures have two genders.
some cultures recognise more than two genders, such as the fa'afafine of Samoa.
This is a challenge to traditional binary classifications of male and female.
the fact that increasing numbers of people now describe themselves as non-binary suggests that cultural understanding is only now beginning to 'catch up' with the lived experience of many.
This suggests that gender identity (and dysphoria) is best seen as a social construction rather than a biological fact.