No G-Spot??

So I masturbate often, I've had sex a few times and I've done a good bit of exploring down there. I feel sensation when something penetrates me but there's no pleasure. It feels like if someone were massaging my arm or something. Nice, but not exactly an inducer of orgasm. No matter what I try, I can't seem to find the legendary G-spot. Is it possible to just not have one or am I just not looking hard enough?