Hard to say what's going on here. DPs aren't easy to execute, though these guys do pretty good with it. My (real) wife says DP is the strongest orgasm a woman can have without a Hitachi. It's a good idea to have the guys take a little cialis or viagra beforehand, though. Because of the challenge of getting into position then penetrating, cocks sometimes go soft. It's a big letdown for the girl when that happens.