Would you have dated your boyfriend(s) if you knew in advance he had a puny dick?
I'm not sure I understand the question. Who starts an exclusive relationship with someone they've never even seen naked? I'm a little under 6" on a good day. my wife definitely knew that long before she married me.
I am thankful to hear what you really think although it continues to support my belief that once a woman knows what amazing sex (by penetration) can bring it will be a huge factor in a relationship.
That's another question altogether. My wife had been with men who were bigger than me, but had never experienced an 8 inch cock until after several years of marriage to me. She learned she was a size queen, and I'd be lying if I said it hasn't changed our relationship at all, but it didn't make her love me any less, so it's not something I ever want to deny her. She'd stop if I truly wanted her to, but I'd seriously have my work cut out for me, trying to deliver the kind of orgasms I've watched her have with bigger men, especially given that she hates dildos. But I give her average orgasms with my average dick, great orgasms with my mouth and fingers, and we love each other enough to get creative when we have to. It's fair to say she didn't marry me for the dick.
I live in asia so we don't often see many blacks/whites/latinos but if I am correct the typical asian pussy is small and tight, so once a woman tasted such stretching I don't know if I can satisfy her again.
That's going to be up to the women in question. If it's true you don't see a lot of diversity where you live, it seems reasonable to guess that not a lot of women in your area have a ton of experience with massive cocks. If that's the case, women who see what you're working with and choose to be with you anyway may be more motivated by other factors. And ones who've experienced bigger partners and are still choosing to give you a chance should be treated to your best self, not someone who worries about not looking like a BBC porn star. I know it's easier said than done, but my personal advice is not to dwell on it if it makes you uncomfortable. Try to focus on making a woman feel special, and using your strengths to make her happy, rather than worry about what she thinks of what you see as shortcomings. If she's seen you naked once and gives you another chance to hang out, no point in worrying about your size beyond that point, right?
Or, if you can handle it,
@BiSubCuck 's advice is great, too. Finding a woman who's honest about loving the feeling of being with bigger men, who will share that experience with you and love for who you are (and not trying to be something you're not) can be extremely rewarding. I'd much rather be with my wife, who loves me deeply but prefers larger cocks than the one I came with, than trying to find a woman who doesn't prioritize sex and "settles" for my average endowment. Happy wife, happy life!