Sentence:  "Yea!" Odred screamed, "Take my <WSD>tarse</WSD> into thy mouth, and my great balls, too. Suck on my balls, make them hot with your sweet mouth. Then suck my <WSD>tarse</WSD> again! Make my cock hard as that of a young ram, or a wild bull!" 
Meaning of the word marked with <WSD> tags:  The penis.