Yes, I find genitals generally the most sexual part of a human body, no matter dick or vagina.
Though different people have different preferences. As a general rule of thumb among the people I know, men are much more likely to find genitals and breasts in particular attractive, and women more commonly enjoy the visualization or fantasies of what is actually done with less regard to what is shown, and more commonly find more explicit images to be quite meh or a turn off. But there are indeed exceptions to both.
Also, shaven.
Yeah, had to mention vibrators or something else that was exclusively used on her is generally fine.
To be clear - this is not a sign of insecurity, not retroactive jealousy, either. This is just a simple wish to not interact with anything sexual used by the other guy I never chose to be intimate with and who can be gross to me, even if this is a pack of otherwise separate condoms. Like, it's not hard or expensive to replace - just buy a damn pack at the nearest pharmacy - and regardless of how much your partner cares, you won't lose anything either way. And I feel like I'm not the only person in the world caring for such matters.
I feel like as much as we try to make it less of a deal, this is just innately uncomfortable for many - not through insecurities it's often written off to, but rather through the nature of the intimate, of the highly personal. I want for our sex life to be ours alone in all aspects, not because someone else was "better" - I seem to be good and skillful and attractive - but because they, for all their previous experience with her, are not invited.
Also, heavily agree on vague answers and signs that partner is pressured. This is a no-go.