Cattle prod low volt

Your girlfriend comes to you and says "you need to be more in control" or " we should put a little electricity in our life" you search the Internets and come up with Cattle prods that will do serious harm to her, or little sex tools that are way too expensive for what they are. You do have a printer, and hopefully a Harbor Freight tools near by.
1. start printing this.
2. go and get the fly swatter and the electrodes shown
3. take the fly swatter apart, take the three leads off the board.