by – Kai, lead somatic sexologist
I am constantly researching pretty much anything to do with the genitals, sex, human sexuality. I have come across something very interesting. Scientists have discovered the oldest and largest sperm ever known to humans. This sperm is so BIG you wont believe me. It so happens that they were found in an Australian cave. You can read more about the gigantic sperm here. Or you watch this Nature video here.