There are either men or women in the world, except for the relationship between men and women, so men and women must be completely separated.
It can't be said to be pure friendship, but it can't be impure, because everyone has his own measure.
Do you think that having a girlfriend will dump all the women? No All necessary relationships are ambiguous and definite, but there is always that limitation. In society, the opposite sex is more useful than the same sex.