And there are some small dicks:
One shaped like a shark:
And one that makes us think whether or not this person has ever seen a penis before:
Testicular Cancer New Zealand says they want to raise awareness of the disease and encourage more men to get themselves checked. And the best way to do that, clearly, is to encourage people to take to the streets and track themselves exercising on a penis-shaped route.
"We hope this campaign will get people talking and walking,"Graeme Woodside, CEO of the charity, told Mashable.
"We want young men to 'Go Balls Out' to show the world they've got the message, and are willing to start the conversation. Guys love some competition, and when it comes to cock and balls, they can get very competitive!"
Testicular cancer is the second most common cancer in young men in Australia (aged 18 to 39), with roughly 800 people getting diagnosed with the disease every year. Symptoms can include a lump or swelling in the testicle, a heavy scrotum and discomfort or pain in a testicle or the scrotum.
What are you waiting for? Go out and track the biggest (or smallest) penis you possibly can – it's all for a good cause.