I only orgasm when i masturbate

I'm a girl and I have had sex before but I only really orgasm when I do it myself. i'm not talking toys, so it's not that I'm desensitized. I don't know, I think it's just that only I know my body that well. But I fake it every time becuase I know either he already did it and he doesn't want to keep going or I just get kinda bored waiting. He doesn't know at all. Is it OK and is it normal?