Supposedly the 3rd guy, let's call him Kawajiri, was meant to let his left nut stay grafted with Jousuke to grow bigger or something. Let's not forget that nut used to date Yasuho, too. But it ended up that Kira took the 1/2 Josuke, 1/2 Kawajiri guy known as Josefumi, a man of the sea, and took over his life. Moreover Kira has all of their nuts. He has 4 nuts. Tooru is going to want those nuts back, since he's now 1/4 Josuke, 1/4 Kawajiri and both of them dead with only half their nuts remaining.