I usually have to use a pillow during sex...to supress my screams. I can get very loud...I've never been good at keeping quiet when I am enjoying myself. My partner is also becoming more vocal when he enjoys himself.

I like to hear noise because it tells me what I am doing right. If my neighbors can hear me then it was a memorable time. :-P

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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. - Albert Einstein