What does the second chair mean?

Two chairs: refers to people who look neither male nor female.

Bottom line: two chairs, two chairs represent men and women of the same sex, one person is either male or female, and one person can only belong to one chair. If a person belongs to two chairs, he is both a man and a woman, that is, he is neither a man nor a woman.

Another way of saying it: it should be two sons, which means to be one, that is, men and women are one, of course, not men and women. This is swearing, which shows that this man is indecisive, indecisive and timid. There is a local proverb: "It is better to be stabbed by a hero than by the second son."

Biological explanation

There are actually six sexes, of course, based on DNA.

Normal 1XX women

2XY normal male

3XXx female, basically no difference.

4XxY men prefer women, that is, we often say two chairs.

There is basically no difference between 5XYy males, but the male testosterone secretion of this gene is too strong, and its external performance is more aggressive, which is prone to violent crimes.

6XO is the most incredible thing. It is called true hermaphrodite in medical clinic. The probability is low. There are two sets of reproductive system, generally only one set is normal or abnormal.