My new training partner told me something I’d never knew before— always focus your hit into a guy’s left nut because most guys left testicle is 10-15% larger than the right so it’s a bigger target with more nerves to smash, causing more intense pain.
Also most guys penis hangs to the right side so it doesn’t shield the left nut so much. I had my doubts so he slid his shorts down to his knees, exposing his genitals and asked which of his nuts looked like a better target. His penis was small but definitely went to the right, and his left testicle did seem larger.