Many people are afraid to touch their testicles because they are afraid of hurting the person who is attached to them. They are sensitive, that is true, but that can work both ways: touching them can also be extremely pleasurable for the person who has them. Here is your guide to playing with balls.
Lifehacker. How to play MASH?
The entire scrotum is quite sensitive, but there are a few areas you should pay extra attention to:
The seam that runs between the two testicles.
The bottom of the scrotum, where the scrotum transitions into the scrotum.