To chick not moaning loudly during sex, put her gag in her mouth
A man with a big beer belly loves to lick the clit of his mistresses because of the debt, because he gets much more pleasure from this than in general from fucking. But one of his drivers moaning too loudly during oral sex and fucking, so he had to put a gag in her mouth, because the neighbors already complained about immoral screams and threatened to call the police. Now he can calmly push through the bolt into all the cracks in the litter, and she only beeps from the emotions without creating loud sounds.