Her orgasms are stronger when her ass is full of oil

my girlfriend is so proud of her ass. It is large and round and she loves it. The love that all men admire her huge ass. I also love his ass, it became one of my fetish favorites. When sleeping wearing shorts too short, and it excites me every time I see it. The wake up with a spanking and she gets up very bad. He began to move his ass, to dance for me. I always oil the body around for those special moments. The fill all over the ass of oil and the purpose behind it. They are one of the things that likes me more. She always has orgasms stronger when we sweep in this manner. What can I say? I am a very lucky man.