WANT to drive that hot UPS guy mad with desire by week's end? Return that slutty top and push-up bra - now there's something Paris Hilton-ier!

A new book boldly proclaims to give readers "Seven Days to Sex Appeal."

But can the right fluttery eyelashes and strategically emphasized body curves really make any man melt?

We tried this sexy makeover on a willing young Post writer to see if using all the right "gender signals" would turn her into a true man-eater, or just make her ashamed to be a woman - or both!