While engaged in the act of sexual intercourse, the guy who starts on the bottom with the girl riding him places his arm around his partner’s back and deftly scoops her turning her around and underneath him without slipping out. At this point the guy is now on top and assumes the missionary position. For this to happen smoothly the girl should be fit and not overweight as it is much harder to one-arm a 300 pounder.
My buddy Chris met the hottest chick last night! She was so fit that he was able to one-arm her with ease.