You’ve probably seen the term underboob being thrown around on blogs and other sites in the past few years, and the term is really as simple as it sounds. Underboob refers to photos in which a woman’s breasts are mostly covered, but the underside is still visible, as in the photos above. Essentially, it’s “upside down cleavage“. It’s hard to say just why so many guys find it hot, but I’d imagine it has to do with the teasing and mystery aspect of it all; it portrays a woman who’s still technically clothed, but who could be willing to show it all off or who could just be a cocktease. Either way, underboob is really sexy, and it’s a way for more prudish celebs to flash some tit without going fully topless, and for seasoned stars like Tera Patrick to mix things up a bit. And, hey, some tit is better than no tit, right?