sentences:  When frottage includes genital-genital rubbing, it is sometimes called "genito-genital" or "GG rubbing".Couples may engage in frottage as a form of foreplay or simply as a method to achieve sexual gratification without the penetrative aspects of vaginal, anal or oral sex, which may also be their personal way of preserving virginity or their way of practicing safer sex.Often, young people will engage in frottage as an earlier stage of sexual intimacy before their idea of more explicit sexual contact is desired.