What about things like kegels/squeezing?
Mouths are probably pretty different right? More tongue movement, unless you are facefucking.
If you’ve ever participated in something like a train - can you feel the difference between a vagina that has already been fucked?
Most definitely.
I’m kinda reassured with how common it is to not cum from/be into oral. I have TMJ so I don’t really suck a lot of cocks. I get asked and like it sometimes, but it hurts after a bit :(
Also appreciate that the experience is probably the same after I’ve been used, always been worried that the last guy in a train is missing out. I guess it is a muscle, so maybe working it out makes it tighter long term.