Even contemporary music such as Prince's "Orgasm" or Marvin Gaye's "You Sure Love to Ball" includes sounds of the female orgasm.[16] 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.[17] In a similar experiment, women did not show significant physiological responses to certain types of music but did report higher levels of sexual arousal.[18] 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 as a means of sexual stimulation.[19] Phone sex is one type of arousal inducer that makes use of this effect.