I don't know that women always do wait. That is a pretty big generalization. I would say it is much more equal, but there could be different reasons for that. Men who just want to get laid are very happy to say they love you. Women can say they love you for many reasons.
Love is a dangerous game.
When it comes out good, it is great, but when it comes out bad, it is a pain. Nothing hurts quite like love. Lots of things influence sexual desire. Sexual desire is actually fragile. People envision it as a strong force that drives people crazy, when in fact it is a very subtle force.