Even when not coupled with "touching", sounds can be highly sexually arousing. Commercial erotic material (mainly produced for the male market) uses such sounds extensively. As early as the 1920s and 30s, several genres of singers turned to "low moans" for erotic effect. Vaudeville Jazz singers often incorporated sex sounds into the narrative of the lyrics. Even contemporary music such as Prince 's "Orgasm" or Marvin Gaye 's " You Sure Love to Ball " includes sounds of the female orgasm.  Research has shown music to be an auditory sexual stimulant. In one mood induction study, exposure to certain music resulted in significantly greater penile tumescence and subjective sexual arousal for men.  In a similar experiment, women did not show significant physiological responses to certain types of music but did reported higher levels of sexual arousal.  Further studies have looked at the connection between auditory stimulation and the experience of sexual pleasure. Whilst the highest levels of physiological and subjective arousal were found for visual stimuli, spoken-text was found to elicit sexual arousal in men implicating sounds a means for sexual stimulation. 
However, there is a wonderful video series out that focuses on this very type of play. From my favorite teacher in the industry, Tristan Taormino, comes Tristan Taormino’s Expert Guide to Pegging DVD () ($ streaming rental) Tristan gets together with some of her adult industry friends and gives you the nitty gritty details on how to strap it on and anally penetrate that special man. The video is up to date and is presented in a fun and sexy way. So not only do you learn very valuable tips, but the movie is hot for you and your partner to watch together as well.