I Kicked George Costanza's ___

(This is a fictional poem) I'm a tough guy and people have nicknamed me Thumper. George Costanza dated my sister and I kicked his ___ when he dumped her. My sister has the habit of picking the worst men. When I got done, they nearly had to call Costanza's next of kin. He said he'd marry her when he got her pregnant but he turned out to be a liar. I put a big dent in that bald head of his and he was sorry that he didn't do right by her. If you're like George Costanza, I have a message for you. If you take advantage of my sister, I'll kick your ___ too.