After taking age and partner status into account, the study showed that sexually active boys who masturbated regularly were eight times more likely to have used a condom during their last intercourse than other boys. This positive outcome has been observed in other studies and has been the basis of public health policy in Great Britain promoting masturbation. Some people actually consider masturbation as a cardiovascular workout. Masturbation makes most people feel good and can sometimes replace sexual intercourse when one cannot find a partner. It can also prepare one for sexual intercourse.

A small study has shown that a test group which only had intercourse experienced, as a whole, lower blood pressure in stressful situations than those who had intercourse but also had masturbated for one or more days. Objects inserted into the vagina or anus should be clean and should not be able to scratch or break. Care should be taken not to fully insert anything into the anus any object used should have a flared or flanged base otherwise getting it out may need medical help.

Modern dildos and anal plugs are designed with this feature. Masturbation involving both a man and a woman (see mutual masturbation) can result in pregnancy only if semen contacts the vulva. Masturbation with a partner can also theoretically result in transmission of sexually transmitted diseases by contact with bodily fluids. A man whose penis has suffered a blunt trauma or injury during intercourse may rarely sustain a penile fracture or suffer from Peyronie's disease.

Phimosis is "a contracted foreskin (that) may cause trouble by hurting when an attempt is made to pull the foreskin back".In these cases, any energetic manipulation of the penis can be problematic. Lawrence I. Sank observed that masturbating prone (lying face downward) could be responsible for sexual problems in some men including anorgasmia and erectile dysfunction, as observed in four men he examined. He coined the term traumatic masturbatory syndrome to describe this theory.

As of 2007, no follow-up research has been conducted and the idea is not familiar or widely-held within the medical community. Some sources, however, give credence to the idea. One sex therapist condemned masturbation by rubbing against a pillow or mattress and Lipsithetal. suggest that masturbation could play a part in male psychogenic sexual dysfunction (MPSD), citing Sank as their authority. MPSD is a difficulty in reaching orgasm during intercourse, and developing a dependence on masturbation.Compulsive masturbation

Masturbating frequently presents no physical, mental or emotional risk in itself, but masturbation can be used to relieve boredom or stress. In either case, as with any "nervous habit", it is more helpful to consider the causes of the boredom or of the stress, rather than try to repress the behavior itself, in this case masturbation.There is some discussion between professionals and other interested parties as to the existence or validity of sexual addictions.side effects of masterburate for woman

Nevertheless, there are lists of warning signs such as when sexual activity affects a person's ability to function in everyday life, or is placing them at risk, for example, of pursuing illegal or destructive activities. Very frequent and compulsive masturbation may be seen as a sign of sexual addiction. Mutual masturbation, the act by which two or more partners stimulate themselves in the presence of each other, allows a couple to reveal the map to their pleasure centers. Witnessing a partner masturbate is a educational activity to find out the method a partner pleases them selfs, allowing each partner to learn exactly how the other enjoys being touched". In 2003, an Australian research team led by Graham Giles of The Cancer Council Australia concluded that frequent masturbation by males appears to help prevent the development of prostate cancer.

A study published in 1997 found an inverse association between death from coronary heart disease and frequency of orgasm even given the risk that myocardial ischaemia and myocardial infarction can be triggered by sexual activity. Excerpt: "The association between frequency or orgasm and all cause mortality was also examined using the midpoint of each response category recoded as number of orgasms per year. The age adjusted odds ratio for an increase of 100 orgasms per year was 0.64 (0.44 to 0.95)". That is, a difference between any two subjects appeared when one subject ejaculated at around two or more times per week than the other.