I don't know what it is, but these images are so hot when it's the lady's hand guiding that cock in instead of the guys hand. It could be a submissive thing. We the viewers don't know what led up to that moment or who's idea it was, but when you grab that cock and guide it in your pussy, we know that you only have one thought on your mind at that moment. Sexy pic. Lucky girl, lucky bull, and a very lucky husband.