I fantasize my wife's moans being more wild and loud with someone else
Moans are an absolute turn-on for me. Unfortunately, my wife is much more subtle with her moans at least with me. It still turns me on to see her breathing hard, gripping my arm or hair hard as she cums from me rubbing her clit or pussy or when eating her out, but she doesn't let out much noise in terms of moans.
Sometimes I fantasize her being with someone else who makes her moan like a slut making me see her in a different different light and watching her be a whole different person with them, maybe that's a girl or guy who brings out this inner slut out of her.