A rooster does not have a penis, it has a cloaca, which is a single opening for reproduction and waste excretion. The rooster has to mount the hen and line up its cloaca with the hen's cloaca to pass its sperm into the hen.
No not in the same way a mammal has a penis. The chickens penis is called a cloaca and is internal. When mating, the rooster touches his cloaca to the inverted female cloaca and sperm in transferred....
There have actually been a surprisingly large number of studies of human penis size. The vast majority of penises are between 5 and 6.5 inches. Anyone who says the average is between 6 and 8 doesn't...
Some people will some people won't (most people won't). If you're still young (teenager), then the best way to get a bigger penis is to masturbate. But if you're older (18+), about the only way is...