But let's forget about length for a minute and talk about shape. Like breasts, penises come in all different shapes, and just because your's mightn't look like the 8-inch cucumber-like penises you see in porn, doesn't mean it's not normal.
So what are the four most common types of penis? Dr. David Shusterman, a urologic surgeon revealed all. What type do you have?
1. The Bender
While a tiny curve in your penis is normal, if it looks like it's starting to bend then you should be concerned, says Shusterman. If it curves in the range of 30 to 60 degrees, there's a possibility you may have Peyronie's disease.
What the hell is Peyronie's disease? Peyronie's disease is penis problem caused by scar tissue, called plaque, that forms inside the penis. It can make the penis to bend upward or to the side.
Your bend may be harmless, but we recommend you visit your GP if this sounds like yours.
2. The Big Shaft
This type is pretty self-explanatory: it's literally when the shaft, or body, of your penis is larger than the head. This results in our penis ending in somewhat of a pointed shape. Women may sometimes mistake your member for a traffic cone.
3. The Curve
This is one of the more common types of penis, according to Shusterman. This sort of penis is where there is a small upward curve to your penis, but it's not as dramatic (or as dangerous) as 'the bender'.
"There's a suspensory ligament that holds your penis to your pelvis and it suspends your penis a little upward," Shusterman said.
The curve usually falls between the 5 to 10 degree mark, and around 10-20 per cent of men are blessed with this type of dong.
4. The Big Head
Like 'the big shaft', 'the big head' is also pretty self-explanatory. This type of penis is probably the most popular amongst men, with Dr. Shusterman reporting that 20 per cent of all penises he's ever seen are like this.
It's when the head of the penis is thicker and larger than the shaft. Depending on length, it may look similar to a mushroom.