Larger penis size influences female attraction and male rival threat perception, highlighting how sexual and competitive pressures together shaped human sexual evolution.

If you lose your sight, you make up for it with other senses. If one arm is amputated, you learn to do twice as many things ...

Women most often ranked male bodies more attractive when they exhibited a higher shoulder-to-hip ratio (i.e. a V-shape) and a larger penis. That said, these attributes had their limits. There came a ...

In many species, sex isn’t fixed for life, and some animals can switch from male to female as part of a reproductive strategy. This process, called sequential hermaphroditism, allows individuals to ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, ...

Researchers found men size up other men by height, body shape, and penis size. Men with larger packages were rated a higher threat than guys with small penises.

When mammals have offspring, both in the wild and in captivity, new life is celebrated. This is especially true for species ...

Australian researchers found that human penis size influences both female attraction and male assessment of rivals.

When it comes to measuring manhood, it has long been said that size does not matter – it’s what one does with it that counts.

For the first time, we know more than we ever expected to know about the sex lives of the majestic beluga whale. It's ...