Why does any one eat testicles.

How do I explain that around here there is a testicle festival and  there are so many people who actually like this delicacy. I have to explain this to my Australian friend and my Morroccan friend because they can't understand why we do this here in the states. One of my friends here told me that if you put the ball in a box of chicken mcnuggets you would never know the difference. And then another friend told me that they tasted like shit and she would never have them again. I haven't gotten up the courage to try them because I am afraid I would vomit. I still don't know how to explain it to someone who lives outside of the states. Our traditions around here are very strange indeed.