I,love the image of a woman on her kness so for the person watching its hot especially the part were she gets to her knees,But its one sided she is pleasing him and his veiw of her somewhat narrow, It isn't the broad image as the picture,Or person watching,And it is her dominating him,and her showing off her skill and desire to please him ,Which is totally hot!And makes for great foreplay.
On her back he can play with her He can see her sexy body watch her reactions and he and can tease and give her pleasure