Male Sexual Response
With the right stimulation, the penis will become larger and begin to get hard. When the penis is in its soft state, there is an equal amount of blood coming in and going out through the blood vessels (arteries and veins) in the penis. During arousal and stimulation, more blood is pumped into the penis and the outflow of blood is reduced. The result is that the spongy tissue in the penis fills with blood and the penis gets larger and harder. This is referred to as an erection. Full erection (getting hard) may occur quite quickly, especially in young men. For others, it may take a longer period of time to get hard or take more direct stimulation of the penis ( e.g. touching, body rubbing, or oral sex) to reach full erection.
Other body changes that happen during male sexual response are an increase in the size of the testicles and they are pulled upwards with the scrotum sac. There is increased muscle tension throughout the body as sexual excitement builds. Sometimes even the nipples become erect. A man may notice a sex flush, or reddening of the skin. During periods of sexual excitement a person’s blood pressure, heart rate and breathing rate tend to increase.
For men, there is a point where they know for sure they are going to have an orgasm – a 2 or 3 second feeling of a “point of no return”. Muscles contract and feelings are very intense and pleasurable. Ejaculation occurs at the point of orgasm when the penis releases semen. Ejaculation may be experienced as a series of contractions and spasms in the legs, stomach, arms and back, as well as the penis. Semen is pushed through the penis by contractions and may spurt, or ooze out. Ejaculations and orgasms will vary from man to man and from time to time. Orgasm and/or ejaculation is followed by a period of relaxation called the refractory period. During this period, the penis usually becomes softer and it is unlikely that the man will have another erection or orgasm. The length of time it takes for a man to get another erection varies, depending on the individual and the situation. In younger men, the refractory period may last only a few minutes, while in older men it may last a few hours or more.