Testes are organs: Of procreation, and you can live without either. Two main functions of testis: 1. Produce sperm to father children; 2. Produce testosterone enhancing male secondary body characteristics and sex drive. Your ability to survive long term is not effected by losing one testis. One testis may still produce sperm, but sperm has everything to do with fertility, noting to do with sexual ability: erection, .
Answered 12/9/2013
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