I've rewatched the original x men movies from the 2000's recently, and I have noticed that in the movies there's a metal noise whenever someone hits logan, do you think that would be audible while fucking him?
You know what, I genuinely believe it's under the circumstance.
I think that Logan can easily switch between gentle sex and rough sex, so when he's fucking 'gently' you're less likely to hear the metallic sound from within him. Though, even in that you may be able to hear it. Sometimes it's with his stiff movements, a roll of the neck or his shoulders when he's getting too tense from the need.
When he's rough, you can hear it. It's faint, but it's there. You just have to listen to it through the other background noise and, hell, you know he;s making you feel too good to focus all that much on that.
So, yeah, I do think that the metal noise is audible within some circumstances. The main circumstances is where it's rough or he's very still/tense and needs to chill tf out, other times there's a low chance it can be heard.