Reason why we moan?

Megan
I've been wondering lately why it is that women moan during sex or when something is pleasurable (at least I do) and from searching online it's said to be "a confidence booster for your other half" but I couldn't care less about that LOL when I moan it makes me more aroused and it just comes out of me naturally... can't just be me right? anyone know why moaning is a thing?