system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do people moan during sex?

How and why is it a natural reflex?
gpt
I know you already marked this as explained, but moaning is just the easiest way to communicate. It doesn't require any effort at all, and you can signal to your partner to keep going. If you said actual words instead of moaning, for a second or two, you would be taking the focus off of the act and focus on the words said instead. The reason some elderly people are completely unintelligible when they talk, is because they don't have the precision in their articulation (because it takes effort to be precise) and it gets the point across. When you moan when you are at the dentist because he has all the tools in your mouth and you're in pain, you are signaling the dentist to stop without saying a word.