Sentence:  Massaging a circle around Dennis's back, Greg said, "Everybody has four potential e-zones -- his nips, his balls, his butthole, his <WSD>choad</WSD>."<br />"What's a <WSD>choad</WSD>?"<br />Greg's pressed between Dennis's legs, and Dennis gasped, "Oh yeah, there." 
Meaning of the word marked with <WSD> tags:  The perineum.