anal masturbation
Anal masturbation can be pleasurable for men and women of any sexual orientation. The most common explanation of how pleasure is derived from anal masturbation is that the anus contains many sensitive nerve endings. Additional explanation of the pleasure derived from anal masturbation includes the induced relaxation, or myofascial release, of various of the pelvic floor muscles that may potentially hold significant tension. Orgasmic function depends in part on healthy functioning of the smooth muscles surrounding the prostate, and of the pelvic floor muscles, and orgasmic dysfunction can potentially be improved through manual rectal massage techniques. For men, anal masturbation can be especially pleasurable because it often stimulates the prostate, which also contains sensitive nerve endings. Some butt plugs for men are specifically shaped for prostate stimulation. For women, insertion of an object into the anus can indirectly stimulate the vagina. Since the muscles of the anus contract during orgasm, the presence of an object holding the sphincter open can strengthen the sensation of the contractions and intensify orgasm for both men and women.[1]
Enemas or anal douches can, for hygenic reasons, be taken prior to anal masturbation if desired, but they can also be a form of anal masturbation themselves: see klismaphilia. Using enemas too frequently can lead to a physical dependence on them in order to have a bowel movement, however.[2][3]
Since the anus does not produce natural lubrication, it is important to apply lubricant to the anal area before insertion of any object. Many people report that they have tried anal insertion, whether by a toy or a penis, but have not repeated the experience due to painful sensations; these sensations were most likely induced by the lack of the usage of a lubricant. In order to increase the chances of pleasant and pain-free insertion, it is important to understand that at rest, the muscles of the sphincter are contracted (clenched) for the retention of waste, so in order to receive a foreign object, it is useful to push outward as if defecating. This opens the sphincter and allows for much easier and pain free insertion. At first it may feel strange to do this in a non-defecation context, but providing that the rectum is empty of waste this will not result in any undesired or unexpected expulsion of fecal matter, one can push without fear. Whether new or experienced, the importance of lubrication cannot be overstated. The initial insertion should take place very slowly and gradually to allow the muscles time to adjust to the introduction and presence of a foreign object.
Commonly inserted objects include butt plugs, anal beads, and phallic vegetables or fruits.
