The average circumference of a flaccid penis is 3.6 inches.
Sperm quality linked to a man's mortality.
Choose the location of your tattoo very, very carefully.
There are about 20 million new sexually transmitted infections each year, costing the healthcare system nearly $16 billion in direct medical costs.
Data from the Kinsey Institute suggest that most penises aren't extreme show-ers or growers. About 12% of penises gained one-third or less of their total length with an erection, ...