… opening the arteries, maximizing blood flow, and boosting size, (Erection drugs work by relaxing these muscles.)
In addition, anxiety triggers the “fight or flight” reflex that sends blood away from the central body, including the penis, and out toward the limbs for escape or self-defense. But as men relax, blood returns to the central body, including the penis.
• Stay warm.
You’ve probably noticed that in chilly locker rooms, your penis seems to shrink. But after a hot shower, it looks larger. Warmth is relaxing and increases blood inflow and size. Before sex, bathe or shower with your lover in warm water.
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Alternative Methods
Beyond these approaches, here are two ways to enhance size temporarily:
Cock Rings.
These rubber donut-shaped devices tightly encircle the erect penis. Typically used to help maintain erection, they also provide a small–temporary–size boost. Flaccid or erect, blood circulates in and out of the penis. One of the veins that carries blood out runs close to the organ’s skin (on top). A ring restricts outflow somewhat by compressing this vein. Don’t expect miracles. Any effect is modest and temporary.
Penis pumps.
These plastic tubes create a partial vacuum around the penis. The vacuum draws blood into the organ, resulting in temporary size enhancement. Models differ, but all include a plastic tube and a pump operated by a hand bulb. You squeeze the bulb, which evacuates air from the tube, drawing a little extra blood into the penis. Just remember, the effect is modest and temporary.
(Article originally seen here.)