never had an issue with fwbs or relationships. I'm not into the hook-up / ons culture, so I don't go for that, but it's not related to my size.
I'm initial attraction level has nothing to do with my dick, because they don't see it while getting to know me and I'm getting to know them. once it happens, I believe my confidence in penis and eagerness to learn how to please my partner in the bedroom does bump me up a bit on the attractive level.
I'm not a good sexual partner just because of my size, which I've had no complaints about. I'm a good sexual partner because I pay attention to and learn how to meet my partners sexual needs as best as I can with the tools that I have and are available.