Wait, were you moaning or mooing?

Rephrased: OP, you're not naturally vocal. You believed that bedroom vocalizations are a turn on for your boyfriend. So you put on a performance intended for his benefit. Would you say that's accurate? Thing is, non-natural vocalizing is the equivalent of faking it. Personally there's no bigger turn off than when a partner fakes it. The way he said "that's a turn off please just behave the way you do naturally because I so dig that" is a whole other story, cause dude was being a dick with that one. Have a chat with him about being respectfull during sexy times or kick his ass to the curb, unless you enjoy being denigrated.