How do i kick myself in the balls?

First, you want to locate yourself in a well populated location, this way everyone can get a good laugh out of your stupidity.

Next, you will want to form your hand into a good, solid, hard clinched, fist. In this way, the pain from the punch will be at its peak and your stupidity will skyrocket!

Last, take your fist and sling it into your balls with as much force as you can!

Now, you have successfully punched yourself in the balls. Congratulations! You're a moron.