There is something to the chemistry of women that drives them to cap a meal with chocolate. Not all women, you may be saying to yourself, and so what? Grok this: there are things about humans in general that are so simple as to go unnoticed or too universal for us to easily identify, and this is one of them. It stands for all of them.
If you can find a way to casually feed a woman chocolate - feed her between five and fifteen minutes after she has just had a full meal - then you are gold. She will eat the chocolate in front of you and listen to whatever you have to say and it will be easier for her to see your point of view.
This is gospel you can apply practically. Go out and try this for yourself. The window you have is very small. Delay too long and the mood will have passed - the woman's thoughts will have turned to her figure. Offer too early and the need will not have manifested. Women! You can experiment with this on yourself. Use chocolate as a bargaining tool. Put a note next to your dental floss or your mirror compact so you read it shortly after eating. Would you like some chocolate? Well, would you?