the plane of this cheekbones , the strong jaw , the rugged tanned skin , how his shoulders stretched so far , like an inverted triangle going down over cut muscle , strong pecs , a smattering of sandy hair and the scalloped edges of his waist , narrowing down to a thicker thatch of hair , and an absolutely enormous erection that made her want to put her mouth on it , to envelop him in the warm cave of her tongue .