Well, it can be very harmful. Psychologically, it can create an unhealthy preoccupation with sexual content. It might also lead to a desensitization to normal sexual stimuli over time. From a social aspect, it violates the norms of appropriate behavior. Moreover, it can potentially lead to problems in self - control and self - discipline, which are important aspects of a healthy lifestyle.
Firstly, it can have a negative effect on mental health. It may cause feelings of guilt or shame later on. Socially, if such behavior were to be known, it could lead to social ostracism. Also, constantly engaging in this behavior might make it difficult to form healthy relationships based on mutual respect and true emotional connection, rather than just sexual urges.
One negative impact is that it can distort one's view of healthy sexual behavior. It may lead to an over - fixation on sexual fantasies and inappropriate ways of achieving sexual arousal.