What is the squishy sack above left testicle?

The squishy sack above the left testicle is called the epididymis. It is a coiled tube that connects the testicle to the vas deferens. The epididymis serves several functions, including:

* Storing sperm: The epididymis stores sperm that have been produced in the testicle.

* Maturing sperm: The epididymis helps to mature sperm by providing them with nutrients and oxygen.

* Transporting sperm: The epididymis transports sperm from the testicle to the vas deferens.

The epididymis is an important part of the male reproductive system, and it plays a vital role in the fertilization process.