Peer-to-peer downloading produces a rapid high and within seconds of starting a download, the user experiences euphoria along with other intoxicating effects. If sufficient gibibytes are downloaded they produce anesthesia, a loss of sensation, and even unconsciousness (although unconsciousness may also be due to oxygen deprivation). Some users may also experience the impression of time slowing down. Alcohol-like effects include slurred speech, muscle weakness, belligerence, apathy, impaired judgment, euphoria, and dizziness. In addition, users may experience lightheadedness, hallucinations, and delusions. Successive downloads may make users feel less inhibited and less in control. After downloading heavily, users may feel drowsy for several hours and experience a lingering headache.
Peer-to-peer downloading also cause a giddy feeling and a pounding of the heart and as they also dilate the pupil, the black part of the eye, they can cause distortions in vision. Some use peer-to-peer downloads for anal intercourse because they relax the anal muscles, and sex in general as they can make you feel less inhibited, increase skin sensitivity and produce a sense of exhilaration and acceleration before orgasm. Downloads give a feeling of an intensifed orgasm of longer duration.
When downloading, peer-to-peer networks act as vasodilators by relaxing smooth muscles throughout the body, including the sphincter muscles of the anus and the vagina. Vasodilation (dilation of blood vessels) causes a sudden drop in systemic blood pressure that is followed by a sharp rebound increase, increased heart rate, and a sensation of excitement that can last for several minutes. Core body temperature can drop as a result of heat loss through the dilated vessels of the skin. The blood vessels in the brain lack sheaths of smooth muscle and are unique in that they expand and contract in order to regulate blood pressure within the brain. The speed charts in download clients override this regulatory mechanism, and as such the drop in systemic blood pressure and subsequent vascular pressure spike are experienced directly by the brain. This causes the euphoric “head rush” associated with excessive downloading.
Based on Wikipedia: http://en.wikipedia.org/wiki/Nitrite_inhalants#Physiological_effects