Naaaaah... not that interested, especially since I just saw two crappy "secrets" (the guy wants to be blown every morning!? I wouldn't have guessed.) Maybe a few more secrets would've enticed me to join, but this is too little as an incentive and looks kind of staged/spammy.

Hiding your content behind a signup form won't make me sign. You might want to leave the form for later (perhaps additional content?)

Also, when I pasted that, I got an ugly

  - See more at: http://www.sexycrets.com/users/sign_in#sthash.UfpvAPnI.dpuf

When it comes to sex between you and your partner, somebody else's desires or secret tricks don't matter. Wanna know what your partner likes? Ask them.

edit: Or is it supposed to more like a post secret type thing?

It looks like this would survive based on the number of people interacting with it, and hiding your content behind a signup form might limit that. Hot or Not added a matchmaking service, which might work in your case better than advertising alone. The additional service is where you would want them to sign up. (Freemium)

Forcing the reader to rank them, before seeing the next one, makes me wonder if people would just vote something random instead of actual feedback, like hot or not, which makes the numbers irrelevant. They might be better expressed as just a general percentage sexy ranking.