None, on average.
"Perfection"--even perfection that is subjective and differs for each of us--is a really high mark to meet. In my everyday life I don't know that I've met a single one; I certainly don't meet them often enough to call it a "regular basis."
Now if we're talking about people who I am ridiculously attracted to, as attracted to somebody as I can be based solely on their bodies, then that happens every once in a while. A couple times per year, perhaps? That's not an indication of absolute perfection, just that one doesn't need to be "perfect" to get the motor going in high gear.