Have you ever heard of something like this before?

Wow. Hmm. Your relationship with your son seems to cross some boundaries. Pretending to kick your teenage son in the testicles seems a bit ill-advised. I have NO wish to judge you. I only say that the dynamics of your relationship with him has lead to a bit of confusion. It doesn't seem possible to as a result of a testicle blow. Maybe the wrestling with an attractive desirable woman thing got him all horned up and the semen release happened as a result of that but didn't become an issue until the ball strike. I wouldn't say take him to the doctor, but I would cut down on the wrestling and the Penthouse Forum description of your son's biological processes. At the very least this will never happen again. Good Luck.