Who's cock? Rui's? Massive. Long. Girthy. Tsukasa-kun's favorite treat. He likes to unzip Rui's pants just so he can feel the sensation when it pops out and smacks him in the face. His mouth waters uncontrollably when he's faced with it. He loves sitting on it and feeling the bump it makes on his tummy.

Cocks in general? Eh. Kinda gross. Chickens are cuter.