There will be no super-easy way to do this with one blog, but I'll certainly give you a few alternatives that you may look into:
1) Create a separate blog (with a different domain) entirely for your "Babe of the Day" posts. This is a fairly simple approach, as it allows you to completely separate the dude-stuff from the chick-friendly stuff. You can then link both blogs to each other if you like via the Blogroll, a text widget, etc.
2) Use categories (this is a one-blog approach and closer to the effect you seem to be after). For your "Babe" posts, always categorize them with a "babes" category (or something similar - totally up to you). For all other posts (the chick-friendly stuff), always categorize them with "everything else" or some other category (again, the actual name of the category is up to you).
Once you have those categories set up, configure your blog to display a static front page (http://en.support.wordpress.com/pages/front-page/). On this static front page, you can add the links to the different categories and advise readers of what they are for - this will allow your readers to only see the content they want. For help with creating links within a page, you can check out http://en.support.wordpress.com/links/#visual-editor-links
Hope this helps; I'm sure users may have some other ideas, as well.