Hello my son told me that he penis and ball went numb when he was sitting on a bench it was a hard bench like football ones he said it stopped when he got up do we need to worry about this he is male 16 years old? we was sitting there for about ahour?

What you described suggests pressure on the Pudendal nerve. It should have resolved by now. Your son may consider using a cushing if he needs to sit on a hard surface. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines.