Like many actresses in giallo, both Edwige Fenech and Barbara Bouchet had considerable amounts of screentime in the nude. These scenes in the genre would just as often involve other women as they did men, a prime example being Duck in Orange Sauce. Nudity was a plot point in The Black Belly of the Tarantula, since the killer paralyzed and killed his victims when they were nude. Modeling-related plotlines weren't all that uncommon, either, the prime example being Strip Nude for Your Killer.
That's a no-brainer, isn't it? Let's just put it this way: nearly every giallo has some form or another of sexuality. It could be a major theme, like in What Have You Done to Solange? and The French Sex Murders, or it could just underscore (or more accurately, overscore) a murder scene, most infamously in Bay of Blood (Twitch of the Death Nerve).
The Alternate Titles
As you can see, several of the gialli mentioned here have alternate titles. The original Italian title's sometimes directly translated into the American title, but usually a completely new one is given. Given the release of gialli is spotty when it comes to the year and country, nearly every territory of release gives the film a different title, meaning that even the U.K. will often give a giallo film a different title than the U.S.. Sometimes, a film completely unrelated to another will be titled as a sequel in a certain country. For example, Deep Red was released as Suspiria 2 in Japan, since Suspiria was released there before Deep Red and was a huge success, and it was thought a "sequel" to Suspiria would garner similar box office returns. Home video releases only increase the confusion, as additional titles are used.
To wrap things up, it looks to me that it didn't take a lot of time for gialli to make its mark on cinema as a whole, and I'm sure many fans of the slasher film genre, as well as those expanding their tastes, are very grateful.