Is he normal ... down there? Even if you know your way around a guy's sexual equipment sum can spring up (sorry!) that may leave you stumped.(Love & Lust)

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No two guys are the same--and that goes double for their penises. In fact there are so many different shapes, sizes, and skin tones that it's tough to know what's normal when you're introduced to a man's package. So we went to experts with your burning queries about dudes' members. These candid answers should clear up any confusion so you can just enjoy.

Is it weird for his penis to be a few different colors?

Not usually. Some men have a purplish tint at the head of their penis, along with discolorations on the shaft. That's because there are so many blood vessels that they sometimes show through the skin. Another reason for multihues: "Lots of guys have circumcision scar tissue on the underside of their penis that turns a darker color," explains Harry Fisch, MD, professor of clinical urology at Columbia University New York-Presbyterian Hospital and coauthor of Size Matters. However, he adds, you do need to be concerned if the discoloration is red or pink, which could be a sign of a rash. If you see this on your guy, urge him to call Iris doctor and go in to have it checked out before the next time you have sex.

Does a curved penis signal a problem?

It depends on the severity of the curve. If it's slight, it can actually be a benefit. A penis can grow slightly curved in any direction, and that curve, along with the perfect angle of entry, can make it easier for him to hit your G-spot, says Sadie Allison, author of Tickle His. Pickle: Your Hands-On Guide to Penis' Pleasing. Guys most commonly curve up or to the side; for a man who arcs skyward, missionary position is your best bet for hitting that pleasure spot. If he has a little side curvature going on, try this: Lie on your side in a near-fetal position--you should face the direction he bends to--then have him kneel behind your butt and enter you.

If there's a major bend--like approaching 90 degrees--there's a problem. "A severe case of Peyronie's disease is the buildup of scar tissue that causes an extreme curve in the penis, and it can be very painful," Dr. Fisch says. Though not very common, it can happen if there is a series of minor injuries to his shaft that can occur during rough sex--even without his knowing it. In addition to the striking curvature, some guys may occasionally have difficulty becoming and staying erect.