Do you care about your significant other's sexual past?

[Nope]

I see what you're saying, that someone won't necessarily judge you based on their past sexual experiences. But, why don't they ask what would make me happier in bed? does the reverse situation not count? I

Of course you should both ask what each other likes. I directed my comment at you because I was talking to you. You were the one concerned with being compared to past lovers.

mean, what you're saying is that I should change to whatever my potential partner wants. I'm not for that kind of compromise of my whole sexuality or whatever aspect to make someone happy

You have a conversation. If something makes you uncomfortable don't do it. It isn't about changing your entire sexuality.

It is fine to want someone who isn't more experienced then you but if that is important to you be upfront with the other person. Just don't assume a more experienced person will automatically compare you to previous lovers

I am socially awkward myself and often wrongly assume that people will dislike or judge me. Could that be why a more experienced partner might concern you?