Earlier quoted context omitted.
This just got me thinking that dating sites definitely fall into this category. Perhaps the answer is not a dating site but a dating tool, much like Facebook does not try to make you social connections, but facilitates the social connections you already have. You could write down the dates you have already been on, what you did/talked about, and compare notes with other people. Anyways, just a thought.
You mean like the whole pick-up artist community? Most girls aren't that interested in recording details of their dates, and definitely don't want other people knowing about their dating life (unless they're really young and want to brag that they're dating a football player, or in one recent case, have had the discriminating taste to sleep with half of the Duke lacrosse team).
Publicly, I assume you mean. As far as I can tell, women talk with their friends about their dates and their dating / sex life in far, far more detail than men do.