Let us answer to the question.
What are the common things between man and woman ?
they are beings, they become human beings.
They are of the same biological species, they have the same number of chromosoms.
They are most time able of nutrition and reproduction, like many others species.
They sometimes search each other, like many others animals.
They can be happy, unhappy, glad, sad, angry, hungry, afraid, thirsty...
Let us enjoy as much differences as similarities.