Women are the originators of every romantic relationship they enter into with the opposite sex.
There is a posture and manner, in which an unmarried lady would carry herself in public, that, men would rarely approach her.
On the other hand, there is also a posture and manner, in which a married lady would carry herself in public, yet, men would confidently approach her.
There is something called body language, that sends out signals of sexual desires in the heart, to the opposite sex.
For example, sometimes, one discovers that he/she instantly dislikes a person being met for the very first time, while, in other instances, the opposite could be the case (of instantly liking someone being met for the very first time).
In each of those two instances, body language takes place, in which a receptive man/woman correctly understands the silent message being passed. If a lady meets a man whom she secretly admires, her body unconsciously sends an instant message to the man in question.
In essence, it is the woman, and not the man, who institutes a relationship.

I think you're wrong.

I think both men and women establish relationships.

I know that most women would not agree to my theory, but I did omit the fact that men would have to do the chasing. Its not as if the woman presents herself on a golden platter.