Masturbation
There are many ways in which a male can choose to masturbate. The most common of these techniques is using the hand. A man simply wraps his hand or two or three fingers around the shaft of his penis (in erection) and moves his hand up and down. As the sensation increases in intensity, the rate of hand movement generally quickens until orgasm occurs. Orgasm is a very pleasurable feeling which results in semen being ejaculated from the penis. Circumcised males or males with dry skin often use a lubricant when masturbating. A lubricant, usually called lube, is a slippery liquid available at stores. It is often on the same shelf as condoms. If someone masturbates a lot without lube, sometimes the skin can become irritated (rough) from too much rubbing. Usually, if the person goes slowly, there is a natural lubricating liquid that drips out of the end of the penis. Books call this liquid pre-ejaculatory fluid or, more commonly, pre-ejaculate (pronounced with an "at" sound at the end, unlike the verb ejaculate, which has an "ate" sound at the end.) A more common name for this liquid is pre-cum. Depending on how much time you take, you may get up to 4 ml (slightly less than 1 U.S. teaspoon) of pre-ejaculate before ejaculation.  Pre-ejaculate is clear and slightly sweet-tasting. It can be rubbed around for added stimulation. It dries very quickly. Lube stays slippery much longer. Soap and shampoo should not be used for masturbating. If they get in the penis, they can hurt. Also, they dry out the skin. If someone masturbates and ejaculates very quickly, they usually won't have pre-ejaculate first. Uncircumcised males often begin masturbating by moving the foreskin back and forth over the glans of the penis to get an erection. People may also rub and touch other sensitive areas of the body such as the scrotum (the bag or sac containing the testicles.)  For most males, the smooth skin on the back of the scrotum is very pleasurable to touch. Due to the placement of the prostate gland, another method (though much more of a social taboo) involves inserting an object, like one's hand or a sex toy, into the anus to rub against the prostate. This causes a sensation of pleasure through the male's body and has been stated to cause orgasms more pleasurable than those caused by simply rubbing the shaft.