The following illustrations are self explanatory
To begin with man and woman are incomplete and a little irregular and therefore unstable as the figure shows. This instability is only as far as the earthy life goes and is exactly the potential life holds. Man tends to be reasoning or head oriented and woman emotional or heart oriented as a general rule.
However when they come together with the spirit of right mental attitude i.e, a willingness to appreciate the opposite values in sacrifice, love energy emanates from each other and they make an ideal couple and the shape squares up and attains stability. Such a couple will be a boon to the entire society spreading positive energy everywhere.
When they live life complementing each other, i.e the woman depending and drawing from the power of reasoning and stability of the man and the man acquiring the emotional qualities of love and tenderness and care they perfectly bond and become one, merging into each other, going beyond duality. Conflict ends and peace dawns.
Evolving further they enter into more blissful coexistence. Though physical separation becomes an increasing reality, that no more troubles them and they are any moment ready for the final departure. Very often they depart from this world one after the other.