[Sonic's cock is easy mode, probably made easier by the fact that he is SOMEHOW managing to stay mostly still and not trying to buck his hips. When you have the sort of crazy abilities that he does, you learn to be careful about where you're slinging your body parts.
As for the part he's struggling to control, mainly his sexual endurance, he's already reached a point where he's lost the ability to form actual words. As soon as the hot, wet heat of Evangeline's mouth engulfs him, he's reduced to a moaning, gasping mess. He's kind of trying to control his volume, but it's an uphill battle at this point. A battle that he is clearly not winning, but it's fine.]
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As for the part he's struggling to control, mainly his sexual endurance, he's already reached a point where he's lost the ability to form actual words. As soon as the hot, wet heat of Evangeline's mouth engulfs him, he's reduced to a moaning, gasping mess. He's kind of trying to control his volume, but it's an uphill battle at this point. A battle that he is clearly not winning, but it's fine.]