Final answer:
Marty may be experiencing varicocele, a condition characterized by enlarged and twisted veins in the scrotum. This condition is often described as feeling like a bag of worms and is more commonly found on the left side of the scrotum. Treatment may not be necessary unless it causes discomfort or affects fertility.
Step-by-step explanation:
Based on the symptoms described, it is possible that Marty is experiencing varicocele. Varicocele is a condition characterized by enlarged and twisted veins in the scrotum, often described as feeling like a bag of worms. It is more commonly found on the left side of the scrotum. The condition is usually harmless and may not require treatment unless it causes discomfort or affects fertility.