Follow the links below to learn more...
Jump to TESTICLE MASSAGE
Jump to HOW TO DEVELOP HUGE TESTICLES
Jump to SMALL TESTICLES?
Jump to LOW HANGING TESTICLES
Jump to TESTICLE FACTS
Jump from large testicles to BIG MALE TESTICLES
Jump to BALLS BIG?
Jump to TESTICLES SHRINKING?
Jump to BIGGEST TESTICLES!
Jump to MEN & BIG BALLS
Jump to UNDESCENDED TESTICLE
Jump to THE TESTICLE TESTOSTERONE CONNECTION
Jump to PENIS-BALLS AND YOUR TESTOSTERONE LEVELS
Jump to ONE TESTICLE?
Jump to DO YOU HAVE OLD MAN BALLS?
Jump to BIGGER TESTICLES
Jump to BOOST YOUR LOW TESTOSTERONE
Studying animals can help in understanding things about people. In mammals , testicles can be very big or very small in relation to the size of the animal itself. The size has to do with the amount of sperm that the male animal needs to make. Some types of male animal generally only have one sexual partner at a time and are called monogamous . Some types of animals generally live in a herd or flock where one male will have many female sexual partners. These males are called polygamous . More sperm is needed by polygamous males than by monogamous males. Polygamous males generally have larger testicles than monogamous males. The testicles grow larger to make more sperm.