He moaned as he heard the words "Fuck in the ass" come from the woman above him.   His low groan of pleasure was once again muffled by her pussy, but reflected in how his cock twitched even more, as his doctor continued to ride him.<br/><br/>He himself, had actually never done anal intercourse.    It was something he had wanted to try always, but previous girlfriends had always been reluctant.    The thought of experiencing it now with these two almost complete strangers was sending him to new levels of arousal.  As he continued to lick and suck, he waited to hear his doctor's response.