@hallmarc There is no specific medical condition in monkeys where their testicles hang lower than usual to the ground. However, like in humans, testicle size and position can vary among individual monkeys and across different species. In some primate species, such as the dangling-nosed monkey or Proboscis monkey, the male's scrotum can be relatively large and pendulous compared to other primate species. The positioning of a monkey's testicles is influenced by factors such as body size, reproductive strategies, and environmental conditions. Testicles typically hang outside the body in the scrotum to maintain a lower temperature for sperm production, but the length of the scrotum and the size of testicles can vary among different monkey species. It's important to note that variations in testicle size and positioning are often influenced by natural selection and evolutionary adaptations rather than specific medical conditions. If you have concerns about the health or behavior of a particular animal, it would be best to consult with a veterinarian or a primatologist for a more detailed assessment.