Not for those who easily blush, this was the actual subject of a recently published research study.
Researchers (Brewer & Colin, 2011) actually refer to sex noises and orgasm screams in much more staid, scientific language: copulatory vocalizations. The question they wanted to answer was whether the noises a woman makes during sex are voluntary or a reflex, or consequence, of orgasm.
You have to wonder where researchers come up with these questions…