This is the 1589th most frequent Portuguese word.
sexo
"Sexo" refers to biological sex or sexual activity.
In this sentence, 'sexo' refers to biological and physiological distinctions between male and female.
O sexo é um aspecto importante da biologia humana.
Sex is an important aspect of human biology.
Here 'sexo' refers to sexual relations or the general topic of sexuality.
Ela evitava falar sobre sexo em público.
She avoided talking about sex in public.
In this context, 'sexo' refers to the classification of gender as used in demographic identification.